The puppy is hiding under the table

Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

100 points, hi, i’m not sure how to get the equation from the graph and table.

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