I don't know how to do these 3 circled problems. can you do it step by step?

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25

Need plz been trying to do it for a long time and still haven’t succeeded

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?