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Given the function f(x) = -2x - 5, determine f(-3)?

User Woko
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2 Answers

22 votes
22 votes
The value of f(-3) is 1. You sub in 3 for x and solve the equation
Given the function f(x) = -2x - 5, determine f(-3)?-example-1
User GreenRover
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15 votes
15 votes

In order to determine f(-3), we just need to use the value of x = -3 in the equation of f(x) and determine its value.

So we have:


\begin{gathered} f(x)=-2x-5 \\ f(-3)=-2\cdot(-3)-5 \\ f(-3)=6-5 \\ f(-3)=1 \end{gathered}

So the value of f(-3) is 1.

User Neteot
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