Question

#I want you please to explain why the answer for Q10 is ( C ) ?...

#I want you please to explain why the answer for Q10 is ( C ) ?

10.

In the equation S = 130 – 2T, where S is hot chocolate sales and T is temperature, sales:

A)

decrease by 10 if temperature falls by 5 degrees.

B)

decrease by 2 if temperature falls by 5 degrees.

C)

increase by 10 if temperature falls by 5 degrees.

D)

increase by 2 if temperature falls by 5 degrees.

# I want you please to explain why the answer for Q41 is ( A ) ?

41.

If a country's GDP is $200 million, and its total population is 10,000, but only 8,000 of these people work, the country's per capita income is:

A)

$20,000.

B)

$25,000.

C)

$11,111.

D)

$100,000.

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Answer #1

10. C) Increase by 10 if temperature falls by 5 degrees.

To measure the changes in sales due to the change in temperature, calculate slope of the given equation

Slope = -2, which means sales is negatively related to the temperature.

So, the sales increase by 10 if temperature falls by 5 degrees.

(10 / 5 = 2) Negatively related so one increases and the other falls.

41. A) $20,000.

Substitute the given values

Per capita income = $20,000

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