Which situation is represented by the graph below? A. temperature stays constant, increases, then stays constant. B. temperature decreases, stays constant, then decreases rapidly. C. temperature increases, decreases, then increases rapidly. D. temperature increases, stays constant, then increases rapidly. Nevermind no one needs to answer this anymore because I already found the answer.

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?