Reveal Math 5-7 Construct Linear Function from Two Points

Example 1: Find the equation for the line through the points (-2,9) and (3,-1).

Step 1: Find slope using the slope formula

• m = 8

• m = -10

• m = -20

• m = -2

Example 1: Find the equation for the line through the points (-2,9) and (3,-1).

Step 2: Find the y-intercept (b)

• b = 9

• b = 7

• b = 5

• m = -13

Check 1: Find the equation for the line through the points (-4,-3) and (5,15).

Step 1: Find slope using the slope formula

• m = 2

• m = 9

• m = 18

• m = 12

Check 1: Find the equation for the line through the points (-4,-3) and (5,15).

Step 2: Find the y-intercept (b)

• b = 7

• b = 5

• b = -11

• m = -5

Check 2: Find the equation for the line through the points (4,10) and (12,16).

Step 1: Find slope using the slope formula

Check 2: Find the equation for the line through the points (4,10) and (12,16).

Step 2: Find the y-intercept (b)

• b = 13

• b = 30

• b = 7

• m = 37

Summary:

Summarize the steps in finding the equation of a line through two points.