Question

C. What LDL level would you expect ifyou exercised 11 hours per week?

Answer 1

10.5 mg/ml

Step-by-step explanation:

To know the expected level of LDL, we need to find the equation of the least-squares line. So using two points on the line like (0,16) and (4, 14), we can calculate the equation of the line as:

`y=(y_2-y_1)/(x_2-x_1)(x-x_1)+y_1`

Where (x1, y1) and (x2, y2) are 2 points in the graph. So, replacing (x1, y1) by (0,16) and (x2, y2) by (4, 14), we get:

`\begin{gathered} y=(14-16)/(4-0)(x-0)+16 \\ y=(-2)/(4)x+16 \\ y=-(1)/(2)x+16 \end{gathered}`

Now, the expected level of LDL can be calculated if we replace x by 11 hours/week, so:

`\begin{gathered} y=-(1)/(2)(11)+16 \\ y=-5.5+16 \\ y=10.5 \end{gathered}`

Therefore, the expected level of LDL is 10.5 mg/ml