Which quadratic function best fits this data? y= −11.41x2+154.42x+143.9 y= 11.41x2+154.42x+143.9 y= −11.41x2+154.42x−143.9 y= 11.41x2+154.42x−143.9

The data has a peak at x=5, so we expect it to be modeled with a parabola that opens downward. That is the x² coefficient will be negative.

For x=1, the third choice gives a better approximation to (x, y) = (1, 32) than does the first choice. It is appropriate to choose

... y = -11.41x²+154.42x-143.9

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The quadratic regression function of a graphing calculator confirms this choice.

answer: the price of one pound cabbage = $ 0.8

the point (10,8) represents that the cost of 10 pounds cabbage is $ 8

step-by-step explanation:

since, here is a proportional relation between the number of pounds of cabbage (x) and the price in dollars (y).

therefore, we can write,

⇒ y = k x

where k is the constant of proportionality.

now, point (5,4) is in the line.

thus, it will satisfies the above equation of line.

⇒ 4 = 5 k

⇒ k = 0.8

thus, the equation of the line is,

y = 0.8 x

a) for x = 1,

y = 0.8

therefore, the cost of one pound of cabbage is 0.8 dollars.

b) in the below graph (10,8) represents that the cost of 10 pounds of cabbage is 8 dollars.

to have more of what you want like money

step-by-step explanation:

save it by not spending on unnecessary stuff and have more