Question

What is the equation of the line with an x-intercept of -1 and a y-intercept of 2?

Answer 1

Standard form: y = ax + b. Must find a and b
When x = 0 -> y-intercept -> b = 2
When y = o --> x-intercept = -1
y = ax + 2
y = a*(-1) = 2 --> 0 = a*(-1) + 2 --> a = 2
Finally: y = 2x + 2.