Which equation represents the line of best fit shown?

Mathematics

2 answers:

Dominik [7]2 years ago

5 0

Answer:

b is the correct answer.

Step-by-step explanation:

Since the slope is negative, it can't be a or d. The y intercept is 810, so c can't be right. Therefore, b is right.

alukav5142 [94]2 years ago

5 0

Answer:

A) y=19x-810

Step-by-step explanation:

This line of best fit is moving downward, or negative. The last number in the equation represents where the line intercepts the y axis, hense the y-intercept. Which is 810.

Now there are only two equations in which 810 is last in the equation. And B) would have the line moving upward, so A is the answer.

Hope this helps!

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The probability of drawing a heart from a standard deck of cards is 0.25. You record the car do you draw and return the car befo

Licemer1 [7]

Answer: C) 0.112

Step-by-step explanation:

In binomial distribution with parameters n (Total trails) and p (probability of getting success sin each trial) , the probability of getting success in x trials is given by :-

$P(X=x)=^nC_xp^x(1-p)^{n-x}$

Given : The probability of drawing a heart from a standard deck of cards is 0.25

Here , getting heart is the success.

Then p= 0.25

For n= 20

The probability that you will draw a heart seven times i.e. x= 7:

$P(X=7)=^{20}C_7(0.25)^7(1-0.25)^{20-7}$

$P(X=7)=\dfrac{20!}{7!(20-7)!}(0.25)^7(1-0.25)^{20-7}\ \ [\because\ ^nC_r=\dfrac{n!}{r!(n-r)!}]$

$=\dfrac{20\times19\times18\times17\times16\times15\times14\times13!}{7!13!}(0.25)^7(0.75)^{13}\\\\=77520(0.00006103515625)(0.0237572640181)\\\\=0.112406195476\approx0.112$