Hello I'm in algebra 1 and I'm not understanding graphing using point slope form

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

Write the pair of fractions as a pair of fractions with a common denominator

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15