Great plans to evaporate enough water from 22 gallons of a 16% ammonia solution to make a 24% ammonia solution M

Given the following statements, which is the best

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Which line is parallel to the line that passes through the points (2, –5) and (–4, 1) a. y=-x+5 b. y=-2/3x+3 c. y=2/3x-2 d. y=x+5