SAT Math Practice Question #15149 - SATify | SATify
#15149
functions
exponential
hard
150 sec
Function f is defined by f(x)=−ax+b, where a and b are constants. The graph of y=f(x)−7 has a y-intercept at (0,−18). If ab=42, what is the value of a?
• Up to 5 characters (6 if negative). Only numbers, decimal (.), fraction (/), negative (-). • Fractions must be in lowest terms. • Mixed numbers must be converted to improper fractions.
