Describe fully the single transformation that will map shape P onto shape Q

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

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

What is the size of the matrix resulting from