Question

Read the following description of a data set.
A medical student reads that with enough sun exposure, the human body can manufacture vitamin D3. This sounds too amazing to be true, so she decides to test it out.
Over the next few weeks, she spends a varying number of hours in the sun, x. At the end of each week, she measures the concentration of vitamin D3 in her blood (in nanograms per milliliter), y.
The least squares regression line of this data set is:
y=9.612x–3.329
Complete the following sentence:
For each additional hour spent in the sun per week, the least squares regression line predicts an additional
nanograms per milliliter of vitamin D3.

Answer 1

For each additional hour spent in the sun per week, the least squares regression line predicts an additional **9.612** nanograms per milliliter of vitamin D3.