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Mathematics>Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

The function y = f(x), defined for -1.5 is less than or equal to x is less than or equal to 1.5, is graphed above. For how many different values of x is f(x) = 0.2?

(A) None
(B) One
(C) Two
(D) Three
(E) Four

答案和解析

答案：E

解析：

f(x) = 0.2 when the point (x，0.2) is on the graph of f. Drawing the line y = 0.2, as in the graph below, shows that the y value is equal to 0.2 for four values of x between negative 1.5 and 1.5.