What is x and y for this geometry question

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

Which of the following expressions is equal to 2x^2+8

10x − 5y + 14 = 0 whats the answer pls