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11 votes
11 votes
If f(x)=5x + 9 what is the range when the domain is {-4, 2/5, 3}?

User Derp
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1 Answer

15 votes
15 votes

Answer:

The range: { -11, 11, 24}

Explanation:

f(x) = 5x + 9 Substitute each number in the domain, which is the x-value, in the equation and solve.

f(-4) = 5(-4) + 9 ; f(-4) = -20 + 9; f(-4) = -11

f(2/5) = 5(2/5) + 9; f(-2/5) = 10/5 + 9; f(2/5) = 2 + 9; f(2/5) = 11

f(3) = 5(3) + 9; f(3) = 15 + 9; f(3) = 24

The range: { -11, 11, 24}

User Grzegorz Grzybek
by
2.8k points
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