Write the equation of the line that passes through the points (1, 1) and (2, 4). Write your answer in slope-intercept form.

Question

1. Write the equation of the line that passes through the points (1, 1) and (2, 4). Write your answer in slope-intercept form.

Answer 1

slope = m = change in y over change in x = (4-1)/(2-1) = 3/1 = 3

y = mx +b

y = 3x +b plug in either point such as (1,1) to solve for b

1 = 3 +b

b = -2

y = -3x -2 in slope intercept form