This question is called "signs of expressions challenge" me

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

Ms. ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms. ortiz charge per kilogram of tomatoes to make on a load of tomatoes?

Describe how making an ‘and’ compound sentence effects your solution set