48 more than the quotient of a number and 64

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 3f(x)? a) shifts the line 3 units up b) shifts the line 3 units down c) increases the slope of the line by a factor of 3 d) decreases the slope of the line by a factor of 3

What’s the answer ? use the picture to see the problem

How do i put 3(x+7) in distributive property