Question

Which equation represents a linear function?

A. y = -x² - 4
B.-3x² + 1 = y
C.y=x²
D.x+2=y

Answer 1

Answer: D. x + 2 = y

Explanation:

The only answer option that represents a linear function is option D. The other three, A, B and C, all represent quadradic functions. You can tell they're quadradic functions because the highest degree is a 2, or a square. This gives a parabola and is not linear.

With this information in mind, the answer is;

"D.x+2=y"