What is the value of3x^2-7x+9 when x =4

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

Yo y do yall have 2 stars that means yall wrong bro

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.