Question

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

Answer 1

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)

Answer 2

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