4.9.2.3 square root - sqrt( x )

The sqrt function - sqrt stands for square root - extracts the square root of the argument. If the argument is 1 the function returns 1. if the argument is 4 the function will return 2.

sphere.YPosition = sqrt( time );

This extracts the square root of the time value:

You can scale the slope of the curve with a multiplyer:

sphere.YPosition = sqr( time ) * 2;

The slope is twice as steep as before: