Which table represents a linear function

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?