Greg is selling t-shirts for the baseball team as a fund raiser. the total amount earned for the team, y, is proportional to the number of t-shirts, x, greg sells. the team earns $7.50 for each sold t-shirt. which equation represents the total amount greg earns for the team?

y = $7.50x

y (total amount earned) is the dependent variable and x (number of t-shirts Greg sells) is independent.

y = kx → y = $7.50x

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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