Can someone find slope for 10-21 please

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

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

On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.