purplepanda69

15.12.2021 • 

Mathematics

Question 8 (1 point) Many local water companies encourage their customers to use devices that limit water use to help reduce their water bills. The scatterplot
and least-squares regression line display the relationship between the number of water conservation devices and monthly water bills for a
random selection of 9 homes that receive their water from a local water company. The equation of the least-squares regression line is
9-36.884-4.386x. Interpret the slope and y intercept of the regression line.
Oa
Ob
Ос
The predicted monthly water bill decreases $36.884 for each additional water conservation device installed. When there are no
water conservation devices, the predicted monthly water bill is-$4.386.
The monthly water bill decreases $4.386 for each additional water conservation device installed. When there are no water
conservation devices, the monthly water bill is $36.884.
The predicted monthly water bill decreases $4.386 for each additional water conservation device installed. When there are no
water conservation devices, the predicted monthly water bill is $36.884.
The predicted monthly water bill increases $36.884 for each additional water conservation device installed. When there are no
water conservation devices, the predicted monthly water billis -$4.386.
Od

Ответ:

sandlobster3129

13.05.2021

Mathematics

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15

Step-by-step explanation:

If 10 oz. box costs $3.50 and a 16 oz. box costs $5.00 and she collected $97.50 we can represent an expression that relates for how many money Jillian made:

(1)

where x is the number of 10 oz. boxes and y is the number of 16 oz. boxes.

She sold 24 boxes therefore:

(2)

We can right equation in terms of y and substitute it into equation 1:

(2)

Solve for x:

Jillian sold 15 10oz. boxes

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