Strawberries are on sale for $0.75 a pound, and you have a coupon for $0.40 off your total purchase. Write a function rule for the cost of n pounds. How much would 20 pounds of strawberries cost?(1 point)
Responses
y= 0.75x ; $15
y= 0.75x - 0.40 ; $14.60
y= (0.75-0.40)x ; $7
y= 0.4x - 0.75 ; $7.25
The correct answer is:
y = 0.75x - 0.40
To find the cost of 20 pounds of strawberries, substitute n = 20 into the function:
y = 0.75(20) - 0.40
y = 15 - 0.40
y = 14.60
Therefore, 20 pounds of strawberries would cost $14.60.
To write a function rule for the cost of n pounds of strawberries, you need to consider the cost per pound and the coupon discount.
The cost per pound of strawberries is given as $0.75. This means, for each pound of strawberries, it would cost $0.75.
The coupon discount is $0.40 off your total purchase. This means, regardless of the quantity of strawberries, you will receive a discount of $0.40.
Thus, the function rule for the cost of n pounds of strawberries can be written as:
y = 0.75n - 0.40
To find out how much 20 pounds of strawberries would cost, you can substitute n = 20 into the function:
y = 0.75(20) - 0.40
y = 15 - 0.40
y = $14.60
Therefore, 20 pounds of strawberries would cost $14.60. The correct response is y = 0.75n - 0.40 ; $14.60.