1. Write an equation that is Parallel to Y=3/4x+4 and that goes through (0,7)

I guess you mean

y = (3/4) x + 4
and not
y = 3 /(4x) + 4

if so then the slope = (3/4)
y = (3/4) x + b
7 = 0 + b so b = 7
y = (3/4) x + 7