Question

How do you solve this?? A line has a slope of 2. It passes through the points (1, 2) and (3, y) . What is the value of y?

Answer 1

The formula of a slope:

`m=(y_2-y_1)/(x_2-x_1)`

We have m = 2 and the points (1, 2) and (3, y). Substitute:

`(y-2)/(3-1)=2\\\\(y-2)/(2)=2\qquad\text{multiply both sides by 2}\\\\y-2=4\qquad\text{add 2 to both sides}\\\\\boxed{y=6}`