Question

Write the equation of the line that has a y-value that increases by 4 for every x that increases by 1. It also crosses the y-axis at –2. A. y = 4x – 2 B. y1/4x – 2 C. y = 2x + 1/4D. y = 2x – 4

Answer 1

`y = 4x - 2`

Step-by-step explanation

The equation of a straight line can be found using the formula

`y =mx + b`

We have that,the y-value increases by 4 for every x that increases by 1.

This implies that, the slope is

`m = (4)/(1) = 4`

The line also crosses the y-axis at –2.

Hence the y-intercept is b=-2.

Therefore the equation is

`y = 4x - 2`

The correct answer is A