Question

How do you write the equation of the line that passes through the points (1, 7) and (5, 15) using function notation?

Answer 1

`y=2x+5`

Explanation:

The slope is given by
`m=(y_2-y_1)/(x_2-x_1)=(15-7)/(5-1)=8/4=2`
so we get

`y=2x+n`
so we get

`7=2+n`

`n=5`