57. The math club is selling T-shirts as a fund-raiser. There is a linear relationship between x, the number of T-shirts sold, and y, the profit in dollars from selling the T-shirts. When the club sells 6 shirts, it makes a profit of $10; when it sells 10 shirts, it makes a profit of $20. Which of the following equations gives the relationship between x and y ?

Answer and Explanation

Your Answer is

Correct Answer is E

Explanation

It can be seen from the question stem that the function is a straight line, passing through (6,10) and (10,20), calculate the slope k=(20-10)/(10-6)=2.5 according to two points, and substitute one point into the available Get E