Can somebody help me with this math question?

Pat listed all the numbers that have 15 as a multiple write the numbers in pats list

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Without multiplying, tell which product is larger and why. 5 × 1/3 or 5 × 2/3 a)5 × 1/3 because 1/3 is less than 2/3 b) 5 × 1/3 because 1/3 is greater than 2/3 c) 5 × 2/3 because 1/3 is less than 23 d) 5 × 23 because 1/3 is greater than 2/3