H E L P: which of the following equations describes a linear function?

a. y=3x^2+1

b. y = square root of x + 8

c. y = 2/7x-4

d. y = 4/x-6

Linear means the power of the placeholder is 1

first one, power is 2

2nd, power is 1/2

3rd, power is 1

4th, power is - 1

answer is C

Linear equations have a constant velocity so they all have the property of kx. Which means that x is to the first power.

Only c. has x to the first power.

a. x is raised to the second power

b. x is raised to the one-half power (square root)

d. x is raised to the negative first power (x^-1=1/x)