Question

Which is the equation of the line with slope 3 that contains point (-1, 5)?

a)y – 1 = 3(x + 5)
b)y – 5 = 3(x + 1)
c)y – 1 = 3(x – 5)
d)y – 5 = 3(x - 1)

Answer 1

Substitute the info you are given in the formula y - y1 = m(x - x1). What do you get?

Answer 2

y-y1=m(x-x1)
(x1,y1)=(-1,5)
m=3
y-5=3(x+1)