Please answer this ASAP

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

How do you determine whether a relationship represented as as graph is linear or nonlinear

Find the area of a parallelogram with base 15 yards and height 21 2/3