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olganol [36]
2 years ago
5

the following table shows a proportional relationship between a and b . write an equation to describe the relationship between a

and b

Mathematics
2 answers:
trapecia [35]2 years ago
8 0

Answer:

b=2 2/3a

Step-by-step explanation:

FrozenT [24]2 years ago
4 0

The rule of given table is (a÷2)-(b÷3).

Step-by-step explanation:

From the given table it is clear that

8 becomes 3

24 becomes 9

40 becomes 15

Rule

(8÷2)-(3÷3) = (4-1) = 3

(24÷2)-(9÷3) = (12-3) = 9

(40÷2)-(15÷3) = (20-5) = 15

So, the equation will be

(a÷2)-(b÷3)

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A sample of 100 women is​ obtained, and their heights​ (in inches) and pulse rates​ (in beats per​ minute) are measured.
Tanzania [10]

Answer:

\hat y= 18.5 +0.890(65)=76.35

Step-by-step explanation:

For this case we have a linear model given by:

\hat y= 18.5 +0.890 X

Where X= represent the height.

Y= represent the beats per minute

And the slope is given by \beta_1 =0.890 and the intercept \beta_0 =18.5

We have the mean for x and y given also \bar X= 62.9 \bar Y= 73.4

And in order to find the best predicted value we just need to replace the value of X= 65, and we got this:

\hat y= 18.5 +0.890(65)=76.35

If we want a confidence interval for the response variable when the predictor variable is x, is given by this formula:

\hat y \pm \sqrt{1+\frac{1}{n} +\frac{(x-\bar X)^2}{(n-1)s^2_x}}

And if we replace we got this:

76.35 \pm \sqrt{1+\frac{1}{100} +\frac{(65-62.9)^2}{(100-1)s^2_x}}

But for this case since we don't have the deviation we can just express it like this.

7 0
3 years ago
Evaluate z + z + z for x = 2, y = -3, z = -4.<br><br> 12<br> -12<br> -9<br> -6<br><br> Need help!!
Nataly_w [17]
I think the answer is -12
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A rectangle has a length of 6 inches and a width of 3 inches.
lutik1710 [3]
C
6*3=18
6*8= 48 and 3*8=24
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1152/18=64

5 0
3 years ago
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a telephone pole casts a 10 food shadow. A horse that stands 5.5 feet tall casts a 2.5 foot shadow. How tall is the pole?
Fittoniya [83]

Answer:

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8 0
3 years ago
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ExtremeBDS [4]
Answer:

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Explanation:

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5 0
2 years ago
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