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3 years ago

Can i please get help with this question?

Mathematics

1 answer:

KATRIN_1 [288]3 years ago

4 0

Answer:

Not proportional.

Step-by-step explanation:

A proportional relationship is a relationship which crosses through the origin (0,0) and which has a proportional constant. We can determine this either by finding (0,0) where x=0 and y=0 in the table or by dividing y/x. None of the tables contain (0,0) so we will divide y by x. We are looking for a table which when each y is divided by its x we have the same constant appearing.

$\frac{2}{1} \neq \frac{3}{2} \neq \frac{4}{3}$

Though it has a point at the origin, these fractions are not equal. This is not proportional.

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Determine whether the following examples of data are quantitative or qualitative. (a) The occupation of your neighbors. Answer:

gavmur [86]

Answer:

a) Qualitative

b) Qualitative

c) Quantitative

d) Quantitative

Step-by-step explanation:

A variable is quantitative if it assumes numerical values, for example 1,2,3.

If it assumes "labels", for example good or bad, it is qualitative.

(a) The occupation of your neighbors. Answer:

Labels. Teacher, trainer, athlete, ...

So it is qualitative

(b) The martial status of your coworkers. Answer:

Labels: Married, single,..

So it is qualitative

(c) Your college GPA. Answer:

Numeric, 2,3,...

So it is quantitative

(d) The amount of bacteria on a piece of moldy bread

Numeric, 0.5mm, etc

So it is quantitative

4 0

3 years ago

If C is between A and B then AC + CB = AB. A. Always B. sometimes D. Never

Arte-miy333 [17]

The answer would be Always

Hope this helped! :D

3 0

3 years ago

(The question is in the photo)

Naddik [55]

Answer:

6.99

Step-by-step explanation:

11.99+2.99+5.99=20.97

20.97/3=6.99

6 0

2 years ago

Read 2 more answers

Write an exponential function in the form y = ab that goes through points (0,4) and (2, 196).

yawa3891 [41]

Answer:

y = 4 $(7)^{x}$

Step-by-step explanation:

The form of the exponential function is y = a $b^{x}$

Use the given points to solve for a and b

Using (0, 4 ), then

4 = a $b^{0}$ ( $b^{0}$ = 1 ), thus a = 4

y = 4 $b^{x}$

Using (2, 196 ), then

196 = 4b² ( divide both sides by 4 )

49 = b² ( take the square root of both sides )

b = $\sqrt{49}$ = 7

y = 4 $(7)^{x}$ ← exponential function

6 0

3 years ago

Previously, an organization reported that teenagers spent 24.5 hours per week, on average, on the phone. The organization thinks

Lena [83]

Answer:

We need to develop a one-tail t-student test ( test to the right )

We reject H₀ we find evidence that student spent more than 24,5 hours on the phone

Step-by-step explanation:

Sample size n = 15 n < 30

And we were asked if the mean is higher than, therefore is a one-tail t-student test ( test to the right )

Population mean μ₀ = 24,5

Sample mean μ = 25,7

Sample standard deviation s = 2

Hypothesis Test:

Null Hypothesis H₀ μ = μ₀

Alternative Hypothesis Hₐ μ > μ₀

t (c) = ?

We will define CI = 95 % then α = 5 % α = 0,05 α/2 = 0,025

n = 15 then degree of freedom df = 14

From t-student table we get: t(c) = 2,1448

And t(s)

t(s) = ( μ - μ₀ ) / s/√n

t(s) = (25,7 - 24,5) /2/√15

t(s) = 2,3237

Now we compare t(c) and t(s)

t(c) = 2,1448 t(s) = 2,3237

t(s) > t(c)

Then we are in the rejection region we reject H₀ we have evidence at 95% of CI that students spend more than 24,5 hours per week on the phone

8 0

2 years ago