Question

Which equation represents a linear function?

Equation 1: y = 2x2 + 1
Equation 2: y2 = 3x + 1
Equation 3: y = 5x3 – 1
Equation 4: y = 4x – 1

Equation 1
Equation 2
Equation 3
Equation 4

Answer 1

The answer is D aka equation 4 I just took the test.

Answer 2

equations 4.  it is the only one that follows the y=mxplus or minusB formula