Slope is ez I’m just to lazy to do the math

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

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)