If the point 4 comma 5 is on the graph of a function, which equation must be true?
Answer
A
f of 4 is equal to 5
B
f of 5 comma 4 is equal to 1
C
f of 5 comma 4 is equal to 9
D
f of 5 is equal to 4
Explanation
A point (x, y) on the graph of a function means that f(x) = y. For the point (4, 5), this gives f(4) = 5. Therefore, the equation that must be true is “f of 4 is equal to 5.”
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