Which variable would be most appropriate as a dependent variable if we want to $20\mathrm{.}1$ predict an individual's maximum oxygen uptake $($Oxy$)$ using age and weight?

Runtime

$20$ Based on the obtained $R$ Square value, which of the following statements is true?

The coefficient of determination is $86\mathrm{.}2$

$86\mathrm{.}2\%$ of the variation in Runtime can be explained by Oxy.

$74\mathrm{.}3\%$ of the variation in Oxy can be explained by Runtime.

There is no relationship between Oxy and Runtime.