Ihave a math problem to simplify how?

Aline passes through 3,7 and 6,9 what equation represents the line

15 there is a line that includes the point 0,10 and has a slope of 7/4. what is it’s equation in slope intercept form

Julie goes to the sports store and spends $40.50 before tax. she buys a pair of shorts for $21.75 and 3 pairs of socks that each cost the same amount. how much does each pair of socks cost? $$