Question

A company is deciding whether or not to hire a new worker. The company must pay the worker hourly and cover a daily cost for insurance. The cost to pay an hourly worker for one day is represented by the function y = 8x + 25, where x is hours.

What is the y-intercept, and what does it represent?

8; it represents the hourly wage for the worker

8; it represents the cost for insurance

25; it represents the cost for insurance

25; it represents the hourly wage for the worker

Answer 1

and will somebody help me check my test please.

Answer 2

@Lena772 @mathlover2014 @mathshelp14

Answer 3

@jim_thompson5910 @whpalmer4 @beccaboo333 @ParthKohli @Preetha

Answer 4

@clara_makdessi

Answer 5

??

Answer 6

Well, the y-intercept would be 8. So now your down to a 50, 50 chance. what do you think the 8 represents?

Answer 7

hourly wage

Answer 8

would you like to help check some of my answers on something.

Answer 9

Sure, I can try. :)

Answer 10

And correct, it is the hourly wage.

Answer 11

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?

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

250; it represents the one-time campaign fee

100; it represents the one-time campaign fee

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

i got D on this.

Answer 12

You suspect that the spiciness of food served in a restaurant is positively correlated with number of soft drinks ordered. You have gathered several observations of people ordering food of different spice-levels and the number of soft drinks they ordered. You have also plotted the data and found a line of best fit. What would be your next steps to test your hypothesis?

Plot all data together on a dot plot to assess if there is any visible correlation between the data sets.

Offer a conclusion based on the data you observed.

Pick two points on the dot plot and find a line of best fit.

Find the correlation coefficient to see how well the line of best fit actually fits the data.

on this one i got C

Answer 13

Okay, the first one is correct.

Answer 14

And the answer to your second question, I think the answer is "A".

Answer 15

You have also plotted the data and found a line of best fit. What would be your next steps to test your hypothesis?
\
but it says this
@Gymnastflips

Answer 16

Okay, hold on one second.

Answer 17

like it said i already plotted it thats why i chose the pick two points, because in the process above it hasnt been done yet.

Answer 18

Yeah, I am pretty sure you are correct. (for some reason my computer just didn't get all the text and that part I didn't see).

Answer 19

i wasnt doubting you or anything, i was just curious.

Answer 20

Okay. xD

Answer 21

i was incorrect. (:

Answer 22

and you were wrong about the hourly wage. (: loll. were both wrong

Answer 23

Oh no! I am very sorry. I am also learning this stuff and I am trying to get extra practice. Sorry.

Answer 24

Do you know what the correct answers were?

Answer 25

uhmmmmmm, im about to re do the test, if you wanna help me try again

Answer 26

Okay, I will try again.

Answer 27

The correlation coefficient for practicing violin and getting better grades in a group of people is 0.8. Analyze the following statement:

Playing violin causes students to get better grades.

Is this a reasonable conclusion?

Yes; students who play violin must necessarily get better grades

Yes; the correlation coefficient is above 0.5, so that implies causation

No; playing violin and earning better grades are completely unrelated

No; even though there is a strong positive correlation, playing violin doesn't cause students to get better grades

Answer 28

Okay, I think it is the last answer, but I am not 100% sure.

Answer 29

How could the relationship of the data be classified?

A fairly weak positive correlation

A fairly strong negative correlation

A fairly weak negative correlation

No correlation

Answer 30

i think it is to i looked it up and someone said they got the correct answer of d

Answer 31

we both went to that site.. lollllll

Answer 32

i know its not a i got it wrogn before.

Answer 33

Okay. I am just looking up what the different kinds of corraltions look similar to your image.
This one is a strong correlation.
http://thequalityweb.com/Images/strong_corr.gif

Answer 34

lol, you know the one with plot and pick two points or whatever, well its not plot. so i know the answer is now observe.

Answer 35

Oh, okay. xD

Answer 36

im re doing it again. i got a 60/100

Answer 37

I think the answer to your question is a weak negative correlation.

Answer 38

Since it is going down in a group instead of scattered everywhere.

Answer 39

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.

I would expect the data to be positively correlated.

I would expect the data to be negatively correlated.

I would expect no correlation.

There is not enough information to determine correlation.

Answer 40

I think it is either C or D.