Question

F(y) = y + y²-3

Match each value of ywith the corresponding value of the function.
1.9
2.-3
3. 17
-1
4.
5.3
f(-2)
f(-4)
f(0)
f(2)
f(4)

Answer 1

1. 9 = f(-4)
2. -3 = f(0)
3. 17 = 4(4)
4. -1 = f(-2)
5. 3 = f(2)

Explanation:

You want to match the given values of f(y) to the y that gives them.

Function evaluation

The attached calculator display shows the function values for -2, -4, 0, 2, 4. Comparing those to the listed values of f(y), we see the correspondence shown above.

The function is evaluated by putting the y-value where y is in the function expression and doing the arithmetic. A calculator or spreadsheet can perform this repetitive math for you, so you only have to enter the y-values once.

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