Can someone help me with these two

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

Given that abcd is a rhombus, what is the value of x?

With both problems. a.s.a.p directions on photo ^