Page 104 - Math Course 3 (Book 1)

The Slope-Intercept Form

Your Turn!

Find the Slope and y-Intercept Write an Equation in Slope-Intercept Form

State the slope and the y-intercept of the graph of State the slope and the y-intercept of the graph of
y = 2x – 7. –5x + y = 1.

A. m = 2; b = –7 A. m = –5; b = 1
B. m = 2; b = 7 B. m = 5; b = 1
C. m = 7; b = 2 C. m = 1; b = 5
D. m = –7; b = 2 D. m = 1; b = –5

Answer Answer

MO. 3 - L6b

Graph Equations Using the
Slope-Intercept Form

Let’s Begin

Graph an Equation

Example

Graph y = –3x + 9 using the slope and y-intercept. Another point on the line is at (6, 1).

Step 1 Find the slope and y-intercept. Step 4 Draw a line through the two points.

slope = –3 y-intercept = 9

Step 2 Graph the y-intercept point at (0, 9) y = –3x + 9

–3
Step 3 Write the slope –3 as . Use it to locate
point on the line. 1

–3 change in y : down 3 units
m =
1 change in x : right 1 unit

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