I forgot how to do this, so I don't need the answer but I more of need the formula/equation. However, the answers would also be great.

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

What is sin 7x/4 ? i need on this urgent trig

What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0