Question

What is the equation of the line that passes through (-1, 5) and (3, -7)?

y = 3x - 2
y = -6x - 3
y = -3x + 2
y = -6x + 3

Answer 1

One way to answer this is by plugging in x=-1 and x=3 for each equation. For the third one (the correct one), plugging in x=-1 gives a result of y=5, and plugging in x=3 gives a result of y=-7.