Astore sold 50 copies of a magazine for $150. each copy of the magazine costs the same. which equation and set of ordered pairs best represents the price, in dollars, of a certain number of copies of the magazine? y = 3x; (1, 3), (2, 6), (3, 9) y = 4x; (1, 4), (2, 8), (3, 12) y = 5x; (1, 5), (2, 10), (3, 15) y = 6x; (1, 6), (2, 12), (3, 18)

The correct option is A.

Step-by-step explanation:

It is given that a store sold 50 copies of a magazine for $150 and each copy of the magazine costs the same.

Let the cost of each magazine be p. So, the cost of 50 copies of a magazine is 50p.

Divide both sides by 50.

The cost of each magazine is 3.

Let x be the number of magazines and y be the price, in dollars. So, the required equation is

At x=1,

At x=2,

At x=3,

The set of ordered pairs is (1, 3), (2, 6), (3, 9).

Therefore the correct option is A.