# Question Video: Evaluating the Output of a Function given Its Input Mathematics • 8th Grade

Fill in the inputโoutput table for the function ๐(๐ฅ) = 5๐ฅ + 3.

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### Video Transcript

Fill in the inputโoutput table for the function ๐ of ๐ฅ equals five ๐ฅ plus three.

We have the function ๐ of ๐ฅ equals five ๐ฅ plus three. And we have a table with input values zero, two, four, and five. When working with functions, the input value is the ๐ฅ-value. This makes the output the ๐ of ๐ฅ value. Itโs the value of the function for any given input.

First, weโll start with zero. ๐ of zero is equal to five times zero plus three. Therefore, ๐ of zero equals three, and we can fill that value into the table. ๐ of two is equal to five times two plus three, which is 13. ๐ of four equals five times four plus three, 23. And finally, ๐ of five equals five times five plus three, 28.

To fill in the table, we use the output values three, 13, 23, and 28, respectively.