Topic: relations and functions

1 & 2 . find the domain and range of this relation. is it a function?

1. {(3,2), (0,5), (2,1) ,(3,10), 7,11)}

2. {(-3,2), (7,8), (4,3) , (10,6), (-2,8)}

(show a little bit of work it would be greatly appreciated ❤️)

3. mr. sanchez’s class sold fruit pies for $1.65 each and mr. kelly’s class sold bottles of fruit juice for $1.36 each. together, the classes sold 79 items and earned $118.17 for their school. (a) write and solve a system of equations that model the problem. show all your work. (b) which class earned more money? (c) how much more money did that class earn?