The bases on a little baseball diamond are 40 feet apart if the catcher stands at home plate and throw to second base how far does the catcher throw

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

I’m really confused and need your assist me with this question i’ve never been taught

Determine the intercepts of the line that passes through the following points. (15,-3)(15,−3) (20,-5)(20,−5) (25,-7)(25,−7)