If y − 3 = 3x, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?

(0, 3), (1, 6), (2, 9)}
{(3, 0), (6, 1), (9, 2)}
{(1, 3), (2, 6), (3, 9)}
{(3, 1), (6, 2), (9, 3)}

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?

Kelli swam upstream for some distance in a hour.she then swam downstream the same river for the same distance in only 6 minutes.if the river flows at 5km/hr, how fast can kelli swim in still water?

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?