We are given a table of values between the number of miles (y) and the number of minutes (x)
A linear function is given by

Where m is the slope and b is the y-intercept.
The slope is given by

Choose any two (x, y) pairs from the given table.
Let us choose (10, 1.2) and (30, 3.6)

Let us substitute these points into the above slope formula.

So, the slope is 0.12

To find the y-intercept (b), choose any one point from the given table
Let us choose (10, 1.2) and substitute it into the above equation

So, the y-intercept is 0
Therefore, the linear function for the given relationship is

You can find the number of miles (y) Emma rides by substituting the number of minutes (x) into function.