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vagabundo [1.1K]
3 years ago
13

HELP PLEASE NEED TO PASS!!!!!!!!!Rob is investigating the effects of font size on the number of words that fit on a page. He cha

nges the font size on an essay and records the number of words on one page of the essay.
The table shows his data.Which equation represents the approximate line of best fit for data, where x represents font size and y represents the number of words on one page?

y = –55x + 407
y = –41x + 814
y = –38x + 922
y = –26x + 723

Mathematics
2 answers:
zepelin [54]3 years ago
8 0

Using the given data you can build the linear regression (described by linear function y=ax+b) by hand or you can use math calculator to do this. In attached diagram you can see that

a=-26.059\approx -26

and

b=722.633\approx 723.

Then the equation of linear function is

y = -26x + 723.

Answer: correct choice is D.

Gnoma [55]3 years ago
3 0

Answer:

D. <em><u>y = –26x + 723</u></em>

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g(x) = 3√(x-5) -1

The process of altering a graph to produce a different version of the preceding graph is known as graph transformation. The graphs can be moved about the x-y plane or translated. They may also be stretched, or they may undergo a mix of these changes.

Horizontal stretching: It means the graph is elongated or shrink in x direction.

Vertical stretching : It means the graph is elongated or shrink in y direction

Vertical translation : It means moving the base of the graph in y direction

Horizontal translation : It means moving the base of the graph in x direction

According to rules of transformation f(x)+c shift c units up and f(x)-c shift c units down.

Therefore, in order to  move the graph down 1 units, we need to subtract given function by 1 , we get

g(x) = 3√x -1

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Therefore, in order to  move the graph left by 5 units, we need to add given function by 5 , we get

g(x) = 3√(x-5) -1

To learn more about graphical transformation,  refer to brainly.com/question/4025726

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