Question

Based on these equations, which one represents the greatest rate?

A y = 1/2 x+8

B y = 2x + 4

C y = 4x + 2

D y= 7x + 5

Answer 1

D

Explanation:

The slope m is a measure of rate.

The equation of a line in slop- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

The given equations are all in this form, thus

A has m =
`(1)/(2)`

B has m = 2

C has m = 4

D has m = 7 ← greatest rate

Thus y = 7x + 5 is the equation with the greatest rate