Liz's math test included a survey question asking how many hours students spent studying for the test. The scatter plot below sh
2 answers:
Complete question :
Liz's math test included a survey question asking how many hours students spent studying for the test. The scatterplot and regression line below show the relationship between how many hours students spent studying and their score on the test.
The fitted line has a slope of 15.
What is the best interpretation of this slope?
Answer:
C.)
The model predicts that the score will increase 15 points for each additional hour of study time.
Step-by-step explanation:
The slope of a regression line represents the rate of change :
From the formula :
Rise / Run = (y2 - y1) / (x2 - x1).
The slope is a Coefficient which shows how much the dependent variable changes per unit change in the independent variable.
Hence, for a slope value of +15, which is positive, meaning an increase ; then the score obtained will increase by 15 per additional unit increase in hour of study.
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Part A:
Given that <span>a dinette table with a cash price of $200 is purchased at $8.50 down and $11.00 per month for 24 months
The total installment price is given by
Part B:
The carrying charges is given by the total installation price minus the cash price.
From part a, we obtained that the total installation price is $272.50 and given that the cash price is $200.
Therefore, the carrying charges is given by
$272.50 - $200.00 = $72.00
Part C:
If the money is to be saved at $11 per month to be able to purchase the table at the cash price, the number of months it will take to be able to save $200 at $11 per month is given by
Therefore, it will take 19 months </span><span>to save the money at the monthly rate needed to buy the item for its cash price.</span>
Given that <span>a dinette table with a cash price of $200 is purchased at $8.50 down and $11.00 per month for 24 months
The total installment price is given by
Part B:
The carrying charges is given by the total installation price minus the cash price.
From part a, we obtained that the total installation price is $272.50 and given that the cash price is $200.
Therefore, the carrying charges is given by
$272.50 - $200.00 = $72.00
Part C:
If the money is to be saved at $11 per month to be able to purchase the table at the cash price, the number of months it will take to be able to save $200 at $11 per month is given by
Therefore, it will take 19 months </span><span>to save the money at the monthly rate needed to buy the item for its cash price.</span>