Mathematics, 10.02.2020 07:47 jdkrisdaimcc11

In 1980, the average monthly rate for basic able TV in the United States was
$7.69. In 2008, the average monthly rate was $6.13. Assume a linear
relationship, and find the average rate of change in the monthly rate per year.

Answers: 2

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Answer from: allysongonzalezlove0

The average rate of change in the monthly rate per year is -$0.056 and this can be determined by using the given data.

Given :

In 1980, the average monthly rate for basic able TV in the United States was $7.69. In 2008, the average monthly rate was $6.13.

The following steps can be used in order to determine the average rate of change in the monthly rate per year:

Step 1 - First, evaluate the difference in the average monthly rate.

Difference in rate = 6.13 - 7.69

= -$1.56

Step 2 - Now, determine the number of years between them.

Period between them = 2008 - 1980 = 28

Step 3 - Now, the average rate of change in the monthly rate per year is calculated as:

$\rm Rate = \dfrac{-1.56}{28}$

Rate = - 0.056

The negative sign indicates that the price decreases.

For more information, refer to the link given below:

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Answer from: sokalotus

The average rate of change in the monthly rate per year is -$0.056 i.e decreases by 0.056 every consecutive year.

Step-by-step explanation:

Step 1; The initial value is $7.69 in 1980 and the final value is $6.13 in 2008.

Difference in values = Final value - initial value = $6.13- $7.69 = -$1.56 (the negative symbol indicates that the cost has gone down with time)

Period between the values =Final year - initial year = 2008 - 1980 = 28 years.

Step 2; To find the rate of change per year, we divide the difference in values in that given period of time by the number of years in that period.

Rate of change per year = Difference in values in that period/ no of years.

= -$1.56 / 28 = -$0.056 (the negative symbol indicates that the cost has gone down with time)

So for every year between 1980 and 2008, the price of the monthly rate for basic able TV reduced by $0.056.

Answer from: Quest

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a. $y = 60(1) - 90 \\ y = 60 - 90 \\ y = - 30$ this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b. $y = 60(1) - 150 \\ y = 60 - 150 \\ y = - 90$ this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

Answer from: Quest

the answer to question 1 is -8, 28.

step-by-step explanation:

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