Presentation is loading. Please wait.

Presentation is loading. Please wait.

Direct and inverse proportion 2 www.waldomaths.com Copyright © R F Barrow 2011, all rights reserved.

Published byEvangeline Gibbs Modified over 9 years ago

Similar presentations

Presentation on theme: "Direct and inverse proportion 2 www.waldomaths.com Copyright © R F Barrow 2011, all rights reserved."— Presentation transcript:

1 Direct and inverse proportion 2 www.waldomaths.com Copyright © R F Barrow 2011, all rights reserved

2 Direct and inverse proportion

3 Solutions: Formula:

4 Do these figures show that y is directly proportional to the square root of x? y426.32.1 x360.810.09 The value of k is the same each time, so the figures do indicate that y is directly proportional to the square root of x.

5

6 Do these figures indicate that y is inversely proportional to the cube of x? y5400.625 x10520 The value of k is the same each time, so the figures do indicate that y is inversely proportional to the cube of x.

7 A Waldomaths clip this, along with other videos and more than 100 applets, all on mathematical themes, can be found on the free website www.waldomaths.com Copyright © R F Barrow 2011, all rights reserved visit Waldomaths today

Download ppt "Direct and inverse proportion 2 www.waldomaths.com Copyright © R F Barrow 2011, all rights reserved."

Similar presentations

Graph Theory – Proofs that K5 and K3,3 are not planar Copyright © R F Barrow 2009, all rights reserved www.waldomaths.com.

Graph Theory – Proofs that K5 and K3,3 are not planar Copyright © R F Barrow 2009, all rights reserved
Upper and Lower Bounds 2 - Calculations www.waldomaths.com Copyright © Waldomaths.com 2010, all rights reserved.

Upper and Lower Bounds 2 - Calculations Copyright © Waldomaths.com 2010, all rights reserved.
Solving Equations by Extracting Roots

Solving Equations by Extracting Roots
Words + picturesPicturesWords Day 11-11-1 1-2 1-31-21-31-11-1 1-2 1-31-21-31-11-1 1-2 1-31-21-3 Day 22-12-1 2-2 2-32-22-32-12-1 2-2 2-32-22-32-12-1 2-2.

Words + picturesPicturesWords Day Day
HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Developmental.

HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Developmental.
Powers and Square Roots. Powers Sometimes numbers multiply themselves a few times for example 3×3×3×3×3.

Powers and Square Roots. Powers Sometimes numbers multiply themselves a few times for example 3×3×3×3×3.
HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Developmental.

HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Developmental.
C = k*r D = r*t t = d/r BMI formula How can we describe relationships among variables in these formulas?

C = k*r D = r*t t = d/r BMI formula How can we describe relationships among variables in these formulas?
Chapter 1 Section 1.4 Order of Operations.

Chapter 1 Section 1.4 Order of Operations.
Section 6.5.1 – Ratio, Proportion, Variation The Vocabulary.

Section – Ratio, Proportion, Variation The Vocabulary.
Section 3.4 Library of Functions; Piecewise-defined Functions Copyright © 2013 Pearson Education, Inc. All rights reserved.

Section 3.4 Library of Functions; Piecewise-defined Functions Copyright © 2013 Pearson Education, Inc. All rights reserved.
HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Developmental.

HAWKES LEARNING SYSTEMS math courseware specialists Copyright © 2011 Hawkes Learning Systems. All rights reserved. Hawkes Learning Systems: Developmental.
Square Root The square root of a nonnegative number is a number that, when multiplied by itself, is equal to that nonnegative number. Square roots have.

Square Root The square root of a nonnegative number is a number that, when multiplied by itself, is equal to that nonnegative number. Square roots have.
Roots Lesson 1-8 square root – one of the given number’s two equal factors 2 is the square root of 4 because 2² = 4 15 is the square root of 225 because.

Roots Lesson 1-8 square root – one of the given number’s two equal factors 2 is the square root of 4 because 2² = 4 15 is the square root of 225 because.
Direct proportion If one variable is in direct proportion to another (sometimes called direct variation) their relationship is described by: p  t p =

Direct proportion If one variable is in direct proportion to another (sometimes called direct variation) their relationship is described by: p  t p =
9.1 Notes Geometric Mean. 9.1 Notes Arithmetic mean is another term that means the same thing as average. The second do now question could have been,

9.1 Notes Geometric Mean. 9.1 Notes Arithmetic mean is another term that means the same thing as average. The second do now question could have been,
Powers and roots. Square each number a) 7 b) 12 c) 20 d) 9 e) 40 a) 49 b) 144 c) 400 d) 81 e) 1600.

Powers and roots. Square each number a) 7 b) 12 c) 20 d) 9 e) 40 a) 49 b) 144 c) 400 d) 81 e) 1600.
Section 3.5 – Mathematical Modeling

Section 3.5 – Mathematical Modeling
Solve by factoring. x² = - 4 – 5x 2,. Solve by factoring. n² = -30 – 11n -4 and -1.

Solve by factoring. x² = - 4 – 5x 2,. Solve by factoring. n² = -30 – 11n -4 and -1.
Copyright © 2014, 2010, and 2006 Pearson Education, Inc. 5-1 Copyright © 2014, 2010, and 2006 Pearson Education, Inc. Chapter 5 Polynomials and Factoring.

Copyright © 2014, 2010, and 2006 Pearson Education, Inc. 5-1 Copyright © 2014, 2010, and 2006 Pearson Education, Inc. Chapter 5 Polynomials and Factoring.

Similar presentations

Ads by Google