Pls help me it is a simple function

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

If a is a nonzero real number then the reciprocal of a is

Finding tbe values of the variables in each kite