Lesson 1-1 Points and Lines. Objective: To find the intersection of two lines and to find the length and the coordinates of the midpoint of a segment.

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Presentation transcript:

Lesson 1-1 Points and Lines

Objective:

To find the intersection of two lines and to find the length and the coordinates of the midpoint of a segment.

Definitions:

coordinates

Definitions: x-axis

Definitions: y-axis

Definitions: origin

Definitions: quadrants

Definitions: x-coordinate

Definitions: y-coordinate

Definitions: solution

Definitions: graph

Definitions: y-intercept

Definitions: x-intercept

Definitions: linear equation

Definitions: general form of a linear equation

Sketch the graph of 3x + 2y = 18.

Determine where the lines intersect. 2x + 5y = 10 3x + 4y = 12

When two linear equations have no common solution, their graph are ???

When two linear equations have infinitely many solutions, their graph are ???

Solve. Then graph the solutions. 3x - y = 9 7x - 5y = 25

Distance Formula:

Midpoint Formula:

If A = (-1, 9) and B = (4, -3), find the length of AB and the coordinates of the midpoint of AB.

Assignment: Pgs. 4-5 C.E.  1-10 all W.E.  1, 3, 7, 10, 11