Question

Payton collected data to show the relationship between the number of hours he practices and the number of errors he makes when playing a new piece of music. The table shows his data.

answer is -4.5

Which is the approximate slope of the line of best fit for the data?

–5.5
–4.5
–2.0
–1.0

Answer 1

-4.5

Explanation:

Answer 2

-4.5

Explanation:

We will use a graphing calculator to find the line of best fit and the corresponding regression equation.

First we enter the x values into the first list. Then we enter the y values into the second list.

We pull up the graph (attached). Next we calculate the linear regression (screenshot attached). In the regression, we can see that the slope is -4.5 (rounded to the nearest tenth).