Can someone help me please? If a baseball is dropped from a skyscraper, what will its speed be after 4.5 seconds?

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain