Help me just give answer

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.

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Why is causation so much more difficult to prove than correlation?