Will someone be my friend please?

Can you simplify 4/7? 24 points will be awarded!

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

Nikolas calculated the volume of the prism. his work is shown below.