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## Homework Statement

Just doing some review, and I keep getting the wrong answer. Can someone explain this for me please?

The equation of the straight line through the points (-2; 1) and (2; 3) is

Book says the correct answer is 2y = x + 4

What are the steps to get 2y = x + 4 ???

## Homework Equations

## The Attempt at a Solution

Here is what I did:

Slope = 1/2

so y =1/2x + c

taking 2 points, 2,3 as in x and y

3=1/2(2)+c

3=1/4+c

2.75=c

so y=1/2x + 2.75

Im so lost....:(