Wayne and winston are scuba diving and are ascending to the surface. the function y = 30x − 105 represents wayne’s elevation in feet in terms of the time in minutes he ascends. the table represents winston’s elevation in feet in terms of the time in minutes he ascends. assume that wayne and winston both ascend at a constant rate.

Can someone me out here number 4 plz

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?

Check all that apply. f is a function. f is a one-to-one function. c is a function. c is a one-to-one function.