Question

medal for best answer!!!!!!


How could the relationship of the data be classified?

Answer 1

A fairly weak positive correlation

A fairly strong negative correlation

A fairly weak negative correlation

A fairly strong positive correlation

Answer 2

"Fairly Strong" usually means a good fit. You can actually SEE the relationship.

Answer 3

I know that it is positive how can u tell whether it is strong or weak?

Answer 4

Asked and answered. "Weak" is vague. You need the mathematics to tall you there is a relationship. If you just look at it and it seems pretty clear, that's strong.

Answer 5

Okay I got 2 more questions I want to make sure are right can you help me?

Answer 6

A company is paying a local radio station to run its commercials. The cost for running commercials is a one-time campaign fee and also a per-second fee for the air time of each commercial. The cost can be modeled by the equation y = 250 + 100x, where x is seconds.



What is the slope, and what does it represent? (1 point)


250; it represents the per-second fee of air time

250; it represents the one-time campaign fee

100; it represents the per-second fee of air time

100; it represents the one-time campaign fee

Answer 7

This is just an algebra problem. Do you know the Slope-Intercept Form of a line?

Answer 8

yes y=mx+b

Answer 9

Right. m is the slope. Do you see that in the equation for advertising costs?

Answer 10

so its the number 10?

Answer 11

I mean 250 sorry

Answer 12

It's the coefficient on the x.

Answer 13

Or it may be 100x

Answer 14

So its C?

Answer 15

The slope is $100 / second

Answer 16

Okay so C?

Answer 17

Or D not sure

Answer 18

That's the slope. $100 is NOT a one-time charge.

Answer 19

O so its D?

Answer 20

Why did you talk yourself out of the correct answer.

$250 is the one-time charge.
$100/sec is the slope.

It's in the problem statement.

Answer 21

I am confused sorry don't really understand

Answer 22

y = mx + b

m is the slope
b is the y-intercept

y = 250 + 100x

100 is the slope
250 is the y-intercept

This is just the algebra. Relating this to the problem, we have

y = 250 + 100x

100 is the slope - the incremental charge for each second.
250 is the y-intercept - the one-time charge.

Answer 23

Okay got it so C

Answer 24

Why do you doubt? Mark it and move on.

Answer 25

Okay Got another question

Given the data set for the length of time a person has been jogging and the person's speed, hypothesize a relationship between the variables.


There is not enough information to determine correlation.

I would expect the data to be positively correlated.

I would expect the data to be negatively correlated.

I would expect no correlation.

Answer 26

I think it is A because there is no speed of the person

Answer 27

And the length of time is not included

Answer 28

Talk out each one. I'll get you started...

"determine"? Who cares? We're supposed to be hypothesizing.

You talk out the other three.

Answer 29

It would be no corelation because if you jog alot it doesn't mean you will jog faster.

Answer 30

There is not a correct answer. It is asking you to hypothesize. Come up with an idea and state what you think. If you can support your hypothesis, it should be correct.

Answer 31

Well this is a multiple choice question

Answer 32

All of them can be somehow explained but which one would you pick?

Answer 33

Hint: This is jogging, not competitive racing.

Answer 34

so as distance increases the speed decreases

Answer 35

Typically, a jogger will run and get tired as they go.

Competitive racers, in longer races, tend to pace themselves so they can mega kick at the end. I think you have it.

Answer 36

So no correlation I guess then

Answer 37

Take your time and think about it. Don't wait for the answer to fall out of the sky. You have to formulate the argument in your mind.

No Correlation
Longer running means nothing. A jogger could be going faster or slower. It makes no difference.

Positive Correlation
Longer running means faster speed. If you think I'm clipping along, now - Just Wait!!

Negative Correlation
Longer running means lower speed. I'm getting tired. Maybe I'll just walk the next mile.

Answer 38

Okay well I am still confused I will post it in the nest thread thanks!

Answer 39

next

Answer 40

Try to keep it to one question per post. It does help make more sense of a single thread.

Answer 41

Okay Ill just go with no corelation

Answer 42

Go read my examples again. Read carefully. Think about each.

Answer 43

I did still don't understand