Unit 1 Getting Ready Part II

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Presentation transcript:

Unit 1 Getting Ready Part II By Mrs. St. Clair

Writing an equation given two points If two points are given, use the POINT-SLOPE formula. Step 1: Find slope using slope formula: m = 𝑦2 −𝑦1 𝑥2 – 𝑥1

Step 2: Replace slope in y = mx t b Step 3: Solve for b (y intercept)

Write the equation of the line

Your Turn:

Think/Pair/Share

Solving multi step equations Ex. 1 4(𝑥 +1) + 2 = 2(𝑥 −1) Ex. 2 3(𝑥−2) =2𝑥−5

Your Turn: 4(2𝑥−1) = 3𝑥 +2

Absolute Value The absolute value equals the distance between any number and zero on a number line.

Your Turn: Find the absolute value of -6.

Finding a solution to the equation To find the solution of an equation, replace the variables in the equation with their given values and check to see if the equation is balanced. Is (2, 3) a solution to 3𝑥 – 4 = 10 ?

Your Turn: Is (0,1) a solution to 2𝑥 +5𝑦 =5?

Domain and Range Domain: the x values Range: the y values Ex. 1 Find the domain and range: 𝑦 = 3𝑥 +4

Your turn: Find the domain and range Input output 13 -5 15 -10 17 -15

How many lines of symmetry?

How many lines of symmetry? Pg 2 Number 11 Part C

Additive Inverse and Multiplicative Inverse Additive Inverse is any given number with its opposite sign. Ex. 1 = -1 What’s the difference between absolute value and additive inverse?

Multiplicative inverse The multiplicative inverse of a number is its reciprocal. Ex.1 The multiplicative inverse of 2/3 is 3/2. What is the multiplicative inverse of -3 ?

Solving the equation for x PRACTICE STATION!!