Suckless SAT Practice

SAT Practicef78208f1-bb88-4092-9147-edda34ecda72

Practice one SAT question at a time

Questions come from the Bluebook question bank.

Function $f$ is a quadratic function where $f (- 20) = 0$ and $f (- 4) = 0$ . The graph of $y = f (x)$ in the xy-plane has a vertex at $left parenthesis r comma negative 64 right parenthesis$ . What is the value of $r$ ?

Enter your answer

Use the exact value the question expects unless it says to round.