Question

Find the slope-intercept form of the equation of the line which contains the points (-2, 5) and (3, 20).

Answer 1

y = 3x - 11

Explanation:

• First, use the y2-y1/x2-x1 format to find the slope: 20 - 5/3 - (-2)

(Note: change 3 - (-2) to 3 + 2 to make it easier for you)

• Simplify 15/5.

Your slope would be 3/1 or 3.

• Now use the slope-intercept format: y = mx + b

(Use either the first point or second point, I chose the first)

5 = 3(-2) + b

• Multiply 3 and -2, which is -6.

• Subtract 5 from -6: -6 - 5 = -11

Your y-intercept is -11.

Hope this helped!