Which equation represents a nonlinear function? y=−85x+19.4 y = − − 8 5 x + 19.4 y=−12x2−7 y = − − 1 2 x 2 − − 7 y=x4+x y = x 4 + x y=32−4x

The answer is below

Step-by-step explanation:

The options are not clear. I would solve a similar question.

A linear function is a function in the form:

y = mx + b;  where y and x are variables, m is the slope and b is the y intercept.

From the options:

a) y = 3x³

Since the equation is not in the form of y = mx + b, hence it is not a linear function. It is a nonlinear function.

b) 3x + 2y = 10

2y = -3x + 10

The equation is in the form of y = mx + b, hence it is a linear function.

c) y = 15.3

The equation is in the form of y = mx + b, hence it is a linear function.

d) y = (1/4)x - 2

The equation is in the form of y = mx + b, hence it is a linear function.

the answer is 40.

proof: