Question

Which equation does not describe a linear function?

y = 7
y = 2x2 – 5
2y = 3x - 9
4x – 6y = 13

Answer 1

y = 2x² – 5

Explanation:

y = 2x² – 5 is not lineal function since x is raises to an exponent.

Answer 2

The second option

Explanation:

All the other choices can be graphed as straight lines, but only the second option is a parabola