SAT Math Practice Question #30406 - SATify | SATify
#30406
linear
functions
medium
75 sec
Calculator OK
A linear function f is defined by f(x)=ax+12, where a is a constant. If f(x+3)=f(x)+9 for all values of x, 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.
