<span>The initial value is the value of the y-coordinate when the x-coordinate is equal to 0. That is the same to say the value at which the graph intercepts the y-axis. So, you justt have to pick the graph whose line intercepts the y-axis at 1/2. </span>
Step-by-step explanation:
Hello there!
Use the formula for the volume of a sphere:

There is your answer!
:)
Radius equals: 4.51
hope this helps! ♥