math

The table shows the outputs y for different inputs x:

Input
(x) 3 7 11 15
Output
(y) 4 6 8 10

Part A: Do the data in this table represent a function? Justify your answer. (3 points)
Part B: Compare the data in the table with the relation f(x) = 5x – 21. Which relation has a greater value when x = 11? (2 points)
Part C: Using the relation in Part B, what is the value of x if f(x) = 99? (5 points)

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  1. A) sure there is one value of y for every value of x

    B) in table y = 8
    in function
    y = 5(11) - 21 = 55-21 = 34

    C) 99 = 5 x - 21

    5 x = 120

    x = 24

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