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help_people
 one year ago
A student is assessing the correlation between the average number of hours of internet browsing and average score on a math test for the students of a class. The table below shows the data:
Number of hours of internet browsing
(x) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5
Score on math test
(y) 95 94 93 92 91 90 89 87 86 85
help_people
 one year ago
A student is assessing the correlation between the average number of hours of internet browsing and average score on a math test for the students of a class. The table below shows the data: Number of hours of internet browsing (x) 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 Score on math test (y) 95 94 93 92 91 90 89 87 86 85

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help_people
 one year ago
Best ResponseYou've already chosen the best response.1Part A: Is there any correlation between the average number of hours of internet browsing and average score on the math test for the students of the class? Justify your answer. Part B: Write a function which best fits the data. Part C: What does the slope and yintercept of the plot indicate?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2what do you think? as the number of hours on the internet increase what happens to the math score?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2yes  and also decrease very much in line

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2for every 0.5 hour on the internet the math score goes down 1 point There is a definite negative correlation here.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2there is just one exception to this rule  between 3 and 3.5 hours

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2where the mark drops by 2

help_people
 one year ago
Best ResponseYou've already chosen the best response.1so what would i say for pt a?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2Just summarise the above  there's a definite negative correlation born out by the data.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2for part B the function will be of the form y = mx + b y = mark and x = hours on internet where m is the slope of the graph of the function and b = value of the marks when the hours = 0, m will be negative

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2for every rise of 0.5 in hours mark decreases by 1 so m = 1/0.5 = ? and b = 95 ( the mark when x = 0)

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2can you figure out m now? 1 / 0.5 = ?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2right so our function is y  2x + 95 and the graph will look like

help_people
 one year ago
Best ResponseYou've already chosen the best response.1whats the  stand for

help_people
 one year ago
Best ResponseYou've already chosen the best response.1or is the function y= 2x + 95?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2dw:1436710595000:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2yes its y = 2x + 95  typo

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2the y intercept represents the mark when hours on i nternet = 0 and the downward slope slows a negative correlation

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2dw:1436710836539:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2* shows a negative correlation

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2I think you can call it a strong negative correlation.

help_people
 one year ago
Best ResponseYou've already chosen the best response.1this is what i put for pt c

help_people
 one year ago
Best ResponseYou've already chosen the best response.1The slope is a negative slope that also means negative correlation ( as the time on the internet goes up, scores go down). The yintercept tells you the approximate score you expect when x=0 ( the score when you spend 0 hours on the internet).
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