State the domain and range for the function f(x) = 2x2 – 7. Show all steps, please.

1 answer:

3 0

2x^2 - 7

we can plug any values of x into this The domain is All Real x.

The graph will be a parabola opening upwards with a minimum value when x = 0 and f(x) will be = -7

so the range is f(x) <= -7 or (-∞, -7]

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elena-s [515]

$k =1.89$ is the constant of proportionality that represents the relationship between the cost, y, to the number of pounds of potatoes, x .

<u>Step-by-step explanation:</u>

Here we have , The cost of 2 pounds of potatoes is $3.78. We need to find the constant of proportionality that represents the relationship between the cost, y, to the number of pounds of potatoes, x . Let's find out:

Cost is y & number of pounds of potatoes is x :

$y = (k)x$ , where k is constant of proportionality that represents the relationship between the cost, y, to the number of pounds of potatoes, x .

⇒ $y = (k)x$

⇒ $3.78 = (k)2$

⇒ $\frac{3.78}{2} = \frac{(k)2}{2}$

⇒ $\frac{3.78}{2} =k$

⇒ $k =1.89$

Therefore, $k =1.89$ is the constant of proportionality that represents the relationship between the cost, y, to the number of pounds of potatoes, x .

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3 years ago

Will give brainliest

Tresset [83]

Wouldn’t it be B. SSS

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