How to Find Values of Functions from Graphs?
First, draw a vertical line through \(4\) on the \(x\)-axis. Then mark the intersection of the vertical line \(x = 4\) and the graph \(f (x)\). Now draw a horizontal line from the point of intersection to the \(y\)-axis.
So, the value of the function \(f(x)\) at \(x = 4\) is \(7\).
Exercises for Finding Values of Functions from Graphs
- Use the graph of \(f(x)\) shown to find \(f(8)\).
- Use the graph of \(f(x)\) shown to find \(f(2)\).
- \(\color{blue}{7}\)
- \(\color{blue}{10}\)
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