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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 the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15