Question

I'm so confused on this question http://gyazo.com/267684bd3acdcc8aa01ab7813fbb051e.png can anyone explain?

Answer 1

we will use point slope form because we have a set of points and a slope.
y - y1 = m(x - x1)
slope(m) = 13/8
(4,7) x1 = 4 and y1 = 7
now just sub your stuff into the formula
y - 7 = 13/8(x - 4)
y - 7 = 13/8x - 52/8 (which reduces to -21/4
y = 13/8x - 21/4 + 7
y = 13/8x - 21/4 + 28/4
y = 13/8x + 7/4

any questions ?

Answer 2

No, i got it thank you