Question

Which equation is a linear function

A.y=x/2 - 5

B.y=2^x - 1

C.y=x^2+7

D.y=2/x+3

Answer 1

The answer should be A

Answer 2

A

Explanation:

A.y=x/2 - 5 => y = (1/2)x - 5. Here x is to the first power. This is a linear function.

B.y=2^x - 1 Thanks to the 2^x term, this is an exponential function.

C.y=x^2+7 Thanks to the x^2 term, this is a quadratic function.

D.y=2/x+3 Non-linear, Similar to y = 2x^(-1) + 3