Question

find an equation of the line through (3,5) and parallel to y=4x+4 write the equation using functional notation??? please help

Answer 1

The line is parallel to y = 4x + 4, so it has the same slope.
What is the slope of y = 4x + 4?

Answer 2

slope is 4 isnt it?

Answer 3

Correct.
Your answer will also have to have slope 4, so you can write
y = 4x + b
To find b, just substitute x and y with 3 and 5, respectively, and solve for b.
Then remember to write the function as f(x) = mx + b with the appropriate values of m and b.