How to show that triangles are similar?

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

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

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )