EASY MATH QUESTION PLEASE PLEASE PLEASE ANSWER ASAP
question in image

Based on what i know about mean, this doesn't add up.

The graph shows the charges for a health club in a month. make a function table for the input-output values. writes an equation that can be used to find the total charge y for the number of x classes

The domain of the following relation: r: {(3, 5), (8, 6), (2, 1), (8, 6)} is (1 point) no domain exists {1, 5, 6} {3, 8, 2, 8} {2, 3, 8}