Question

Write the equation of line AB, in slope-intercept form, given the points A(0, 6) and B(-6, -12). In your final answer, include all of your calculations.

Answer 1

Since A is on the y-axis, 6 is the y-intercept.

m = Δy ÷ Δx
m = (0 + 6) ÷ (6 + 12)
m = 6 ÷ 18
m = $\frac{1}{3}$

y = $\frac{1}{3}$x + 6