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3 years ago

6

From a sample of 50 incinerators in a major city. of the 50 samples, only 18 met an environmental standard for the concentration

of a hazardous compound. can it be concluded that fewer than half of the incinerators in the city meet the standard?

1 answer:

yuradex [85]3 years ago

6 0

Yes. since half of 50 is 25 it is correct to say that 18 is less than half

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Answer:

B choice.

Step-by-step explanation:

The graph decreases. Therefore, the slope is in negative. We can rule out A and C choices.

It is very obvious to tell because of steepness. Low steepness = low value

High steepness = high value.

We can also find the slope by using rise/run.

$m = \frac{dy}{dx}$

The change of y over the change of x.

Given the coordinate points (0,1) and (4,0). Both points are part of the graph.

$m = \frac{y_2 - y_1}{x_2 - x_1}$

$m = \frac{1 - 0}{0 - 4} \\ m = \frac{1}{ - 4} \\ m = - \frac{1}{4}$

Therefore the value of m is - 1/4

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3 years ago

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navik [9.2K]

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Answer:

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Step-by-step explanation:

This is the only one that has the correct 2:5 salt : pepper ratio.

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(C is a possibility but doubt it's an answer)

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