Below i think the question that i chose is right but i want a second opinion

The slope is 7, because from 0 to 3, the increase is 21, from 3 to 5 it is 14 and from 5 to 7 it is also 14.

The starting value is 13, this is given from x=0.

So the equation is y = 7x + 13, but that's not in the list.

We'll have to manipulate it until we find the formula that's equivalent. If we move the 13 to the left and the y to the right (the signs swap as you know), we get:

-13 = 7x - y

Swap the left and the right side and you get

7x - y = -13, that's answer D!