Question

At Staples, 2 dry erase markers cost $2.50. Find the constant of proportionality and write an equation to represent the cost (C) for buying markers (M).

A) Constant of proportionality = $1.25, Equation: C = 1.25M
B) Constant of proportionality = $5.00, Equation: C = 5M
C) Constant of proportionality = $0.625, Equation: C = 0.625M
D) Constant of proportionality = $2.50, Equation: C = 2.50M

Answer 1

The constant of proportionality for the cost of dry erase markers at Staples is $1.25, giving us the equation C = 1.25M, where C is the total cost and M is the number of markers.

Step-by-step explanation:

To find the constant of proportionality and write an equation representing the cost (C) for buying markers (M) at Staples, where 2 dry erase markers cost $2.50, we note that the constant of proportionality, k, is the cost per marker. Since 2 markers cost $2.50, one marker would cost $2.50 / 2 = $1.25. Therefore, the constant of proportionality is $1.25, and the equation would be C = 1.25M, where C is the total cost and M is the number of markers.