Question

Find the point slope equation for the line that passes through the points ( -2, -20 ) and (9, 79). Use the first point in your equation y+ =

Answer 1

y = 9x - 2

Explanation:

(-2 , -20) (9,79)

79 - (-20) = 99

9 - (-2) = 11

99/11 = 9

`y - y1 = m(x - x1)`

y - 79 = 9 ( x - 9)

y - 79 = 9x - 81

y = 9x -81 + 79

y = 9x -2