To find the elevation level in feet after skiing for 60 seconds using the linear model \( y = -30x + 6000 \), you can substitute \( x = 60 \) into the equation.
\[ y = -30(60) + 6000 \]
Calculating this:
\[ y = -1800 + 6000 \] \[ y = 4200 \]
So, after 60 seconds of skiing, you will be 4,200 feet high.
The correct answer is: After 60 seconds of skiing, you will be 4,200 feet high.