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3 years ago

8

Use the above graph to answer the following question. Which line indicates the demand curve? (1 point)

1 answer:

IRINA_888 [86]3 years ago

8 0

Answer:

A - one

Step-by-step explanation:

A typical demand curve, in economics, depicts the relationship between price of a commodity on the y-axis, and quantity demanded on the x-axis.

The demand curve obeys the Law of Demand, which states that the higher the price, the lower the quantity demanded of that commodity, and vice versa, all things being equal. Thus, a typical demand curve will slope downwards, from left to the right.

Therefore, line 1 indicates the demand curve.

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Step-by-step explanation:

Let the quadratic function be

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We substitute $(0,-7)$ to obtain;

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We finally substitute $(1,-1)$ to obtain;

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We put equation (2) into equation (1) to get;

$9=16a-4b-7$

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We put $a=2$ into equation (5) to get;

$2+b=6$

$\Rightarrow b=6-2$

$\Rightarrow b=4$

The reqiured quadratic function is

$y=2x^2+4x-7$

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