Question

Which of the following equations is not a linear equation?

A. x – 4y = -1
B. x = 2
C. y = x - 1/2
D. x^2 = 5y ^2

Answer 1

D.

Explanation:

All other equations have x or y to the power of one so they are linear. D. has x or y to the power of two, so it's not linear. Quadratics and any variable to the power of 2 and above is not linear (numbers on their own are also always linear, so ignore any powers on them)