Find an equation of the line having the given slope and containing the given point.

m=7/8, (5,-6)

The equation of the line is y=?

The equation of a line passing through a point (x1,y1)=(5,-6) with a slope m=7/8

is
L : (y-y1)=m(x-x1)

Substitute numeric values of x1,y1 and m into L to get the final equation.