Question

A store sells 20 ice cream bars per hour for $4 each, but on discount days, it sells 35 ice cream bars per hour for $3. Based on these two data points, what would be the slope for the relationship between the price and the quantity of ice cream sold? (price is on the vertical axis).

Answer 1

The slope for the relationship between the price and the quantity of ice cream sold is -$0.067 per unit

Linear equation

A linear equation is in the form:

y = mx + b

where y, x are variables, m is the rate of change and b is the y intercept.

Let y represent the price (vertical axis) and x represent the quantity.

The slope = ($3 - $4)/(35 - 20) = -$0.067 per unit

The slope for the relationship between the price and the quantity of ice cream sold is -$0.067 per unit

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