In what direction is a line with an undefined slope going

If there are 12 moths and some have 31 days and others have 30 days how many have 28 days?

Which term best describes the association between variables a and b

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