9. Write the equation of the line with the given properties. Express your answer in general form Ax + By = C, where A, B, and C are integers.
(a) Vertical; contains the point (4,7). (1 point)
(b) Contains the points (2,3) and (-3,-7). (3 points)
Perpendicular to the line 3x - 2y = 6; containing the point (-3,6). (5 points)

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?