Question the-fu
2.1 Nonlinear Functions - Function composition and evaluation
0:00
The function is defined by . What is the value of ?
A.
B.
C.
D.
The function g is defined by g x = 4 x - 6 . What is
Medium-difficulty · SAT Math · Nonlinear Functions — Function composition and evaluation. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice A is correct. It’s given that the function is defined by . Substituting for into the given equation yields , or .
Choice B is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect. This is the value of for which , not the value of .
More Nonlinear Functions practice questions
- f x = 4 x 2 - 50 x + 126 The given equation
- The function p is defined by p n = 7 n 3 . What
- The parabola opens downward. The vertex is at point (4 comma 9). The parabola
- f x = x + 7 2 + 4 The function f is defined
- The function f w = 6 w 2 gives the area of a rectangle,
- The exponential function g is defined by g x = 19 · a x
- In quadrant 3, the curve rises to its maximum at point (0 comma negative
- q ( x ) = 32 ( 2 x ) Which table gives three
Browse all Passport to Advanced Math practice questions or return to the full SAT question bank.