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Yakvenalex [24]
3 years ago
12

Anyone help me with this please

Mathematics
2 answers:
faust18 [17]3 years ago
6 0
B.
Just trust me on that
Umnica [9.8K]3 years ago
5 0
Option A is the right answer.

We know that the y-intercept is (0, 3), since that's the point on y-axis. Now that we know this, we know the value of 'b'

y = mx + b
y = mx + 3

Now all we have to do is solve for m. Recall that 'm' represents the slope, and that the equation to find the slope is rise/run. Essentially, you have to find two points and figure out the number of units you have to travel through the x-axis and y-axis.

In this question, they've already gave us two points (The black dots) that we can use to find the slope. In order to get the dot on the to the dot on the bottom, we have to go down 5 times. This means that the rise is -5.

Now all we have to do is go right until we reach the point. In this question, you have to go the right 4 times, making the run 4.

And so we've found the slope: -5/4.
Since the slope is 'm,' we can now complete our equation.
y = mx + 3
y = -5/4x + 3

Let me know if you need me to explain anything in more depth :))
-T.B.
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While the histogram is not perfectly symmetric (there is mild right skewness), it is close enough to being symmetric and mound-s
erma4kov [3.2K]

Answer:

a) 97.1\% b) 13.6\%  c) 772 \:calories

Step-by-step explanation:

\mu=1071,\:\sigma=301

1) The 68-95-99.7 rule tells us how a distribution is divided. 99.7% of the distribution should fall within 3; 95%,  2 and 68%, 1 standard deviation from the mean.

As you can see in the graph.

a). What is the approximate percentage of the Chipotle meals that have more than 469 calories?

By the rule

We have the interval 68% is equal to the mean plus 1 standard deviation and minus one standard deviation.

So

68\%=(\mu-2\sigma,\mu+2\sigma)=(1071-2(301), 1071+2(301)=(469,1672)

But the question wants to know more than 469 calories, then13.6\%+34\%+34\%+13.6\%+2.1\%=97.1\%\\

b. What is the approximate percentage of Chipotle meals with calorie amounts between 1372 calories and 1673 calories?

Check the graph below

This percentage is the interval, which is a quarter of that 95%

(\mu +\sigma,\mu+2\sigma)=(1372,1673)=\frac{95\%}{4}=13.6\%

c.. If a particular meal's calorie amount is equal to the 16th percentile of Chipotle meal calorie amounts, how many calories are in the meal?

Since we're dealing with a Normal Curve, then to find the 16th percentile we need:

  • The Mean and Standard deviation
  • The Z score and then multiply by that Standard Deviation
  • Add this to the mean

.Z\: score=-0.994\\\\(-0.994)*301=-299.194\\-299.194+\mu \Rightarrow -299.194+1071=771.806\approx772

We have the location 772 = 16th percentile. Since this meal is equal to 16th percentile, then this meal has 772 calories.

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x = 14

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I hope this helps you



if 4 students 12$


10 students? $


?×4=12×10


?=120÷4


?=30$

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