Final answer:
To find the cost of 9 pairs of socks, we can set up a proportion with the given information. The cost of 6 pairs of socks is $4.50, so we can solve for the cost of 9 pairs using cross-multiplication.
Step-by-step explanation:
To find the cost of 9 pairs of socks, we can use a proportion with the given information. Let's set up the proportion:
6 pairs of socks cost $4.50, so we have 6 pairs / $4.50 = 9 pairs / x dollars (where x is the cost of 9 pairs).
To solve for x, we can cross-multiply: 6 * x = 9 * $4.50. Now, we can solve for x by dividing both sides of the equation by 6: x = (9 * $4.50) / 6 = $6.75.
Therefore, the cost of 9 pairs of socks is $6.75.