Question

Write the equation of the line in slope-intercept form that contains the points (4, -1) and (9, 9).

Answer 1

y = 2x - 9

Explanation:

y2 - y1 / x2 - x1

9 - (-1) / 9 - 4

10 / 5

= 2

y = 2x + b

-1 = 2(4) + b

-1 = 8 + b

-9 = b