Linear functions SAT question

Math · Algebra · Easy · Answer it here, explanation included.

The function $f$ is defined by the equation $f (x) = 100 x + 2$ . What is the value of $f (x)$ when $x = 9$ ?

ExplanationShow

Choice D is correct. Substituting $9$ for $x$ in the given equation yields $f (9) = 100 (9) + 2$ , or $f (9) = 902$ . Therefore, the value of $f (x)$ when $x = 9$ is $902$ .

Choice A is incorrect. This is the value of $f (x)$ when $x = 1.09$ .

Choice B is incorrect. This is the value of $f (x)$ when $x = 1.16$ .

Choice C is incorrect. This is the value of $f (x)$ when $x = 8.98$ .

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