Question the-fu
1.1 Linear Functions - Graphs in slope-intercept, point-slope, standard form
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The function is defined by . What is the value of ?
A.
B.
C.
D.
The function f is defined by f ( x ) = 3 x - 8 .
Medium-difficulty · SAT Math · Linear Functions — Graphs in slope-intercept, point-slope, standard form. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice B is correct. It’s given that the function is defined by . The value of is the value of when . Substituting for in the given equation yields , which is equivalent to , or .
Choice A is incorrect. This is the value of when , rather than .
Choice C is incorrect. This is the value of , rather than .
Choice D is incorrect. This is the value of , rather than .
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