Question

Write an equation for the line that passes through (0, -9) and (3, 0).

Answer 1

First find the slope of the line:-

= (0- - 9) / (3 - 0)  =  9/3 = 3 

Now use the point slope form of the equation to plug in the point (3,0):-
y - y1 = 3(x - x1)
y1 = 0 and x1 = 3:-
y - 0 = 3(x - 3)

y = 3x - 9  is the answer   Its D.