Which graph represents the linear function y= -5x + 2

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

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

Use a transformation to solve the equation. w/4 = 8 can you also leave a detailed explanation on how this equation = 32