Which of the following equations is linear?

A. y = x²

B. y = 3/x

C. y = 3x + 2

D. xy = 4

Answer = C

A is a parabola, so it'll look like a "U" shape on a graph, not a line. A is incorrect

B would look like two curved lines on a graph, so it's not linear.

C is in slope-intercept form, which is a big clue that it's probably linear, which it is. C is correct.

D would look like two curved lines, so D is incorrect.