Identifying Functions

1. \(y =4\)

We should look for the point on the graph whose \(x\)-coordinate is \(7\).

The point on the graph whose \(x\)-coordinate is \(7\) is the point \((7,4)\).

When the input is \(7\), the output is \(4\).

2. \(y=1\)

We should look for the point on the graph whose \(x\)-coordinate is \(4\).

The point on the graph whose \(x\)-coordinate is \(4\) is the point \((4,1)\).

When the input is \(4\), the output is \(1\).

3. \(y = -2\)

We should look for the point on the graph whose \(x\)-coordinate is \(2\).

The point on the graph whose \(x\)-coordinate is \(2\) is the point \((2,-2)\).

When the input is \(2\), the output is \(-2\)

4. \(y=7\)

We should look for the point on the graph whose \(x\)-coordinate is \(-5\).

The point on the graph whose \(x\)-coordinate is \(-5\) is the point \((-5,7)\).

When the input is \(-5\), the output is \(7\).