REVIEW: Brinlyn increased the amount of water she drank per day from 32 oz to 40 oz. By what percentage did Brinlyn increase the amount of water she drank each day?
percent change = amount of changeoriginal amount⋅100
(1 point)
Responses
8%
8%
18.75%
18.75%
20%
20%
25%
The correct answer is 25%.
To calculate the percentage increase, we can use the formula:
percent change = (amount of change / original amount) * 100.
In this case, the amount of change is 40 oz - 32 oz = 8 oz.
The original amount was 32 oz.
So, the percentage increase is (8 oz / 32 oz) * 100 = 25%.
Candace purchased 6 gallons of gas for $13.56. What is the constant of proportionality that relates the cost in dollars, y, to the number of gallons, x?
Remember, the constant of proportionality is k=yx
.
(1 point)
Responses
$1.23 per gallon
$1.23 per gallon
$2.26 per gallon
$2.26 per gallon
$0.44 per gallon
$0.44 per gallon
$3.04 per gallon
The correct answer is $2.26 per gallon.
To find the constant of proportionality, we divide the cost in dollars, y, by the number of gallons, x.
Constant of proportionality (k) = y/x = 13.56/6 = $2.26 per gallon.