What is the equation that represents the direct variation and what's the value of y if x=-2

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old

How many solutions does the nonlinear system of equations graphed below have?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)