Answer:
Linear functions are those whose graph is a straight line. A linear function has the following form. y = f(x) = a + bx. A linear function has one independent variable and one dependent variable.
Step-by-step explanation:
3: $6.35
4. $2.73
5: $3.38
6. Sport city because its racket costs $7 less than the other one
Multiply all of those numbers