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Part 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 y-intercept of the plot indicate?
what do you think? as the number of hours on the internet increase what happens to the math score?
yes - and also decrease very much in line
for every 0.5 hour on the internet the math score goes down 1 point There is a definite negative correlation here.
there is just one exception to this rule - between 3 and 3.5 hours
where the mark drops by 2
so what would i say for pt a?
Just summarise the above - there's a definite negative correlation born out by the data.
for 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
for every rise of 0.5 in hours mark decreases by 1 so m = -1/0.5 = ? and b = 95 ( the mark when x = 0)
can you figure out m now? -1 / 0.5 = ?
hold on srry
right so our function is y - -2x + 95 and the graph will look like
whats the -- stand for
or is the function y= -2x + 95?
yes its y = -2x + 95 - typo
the y intercept represents the mark when hours on i nternet = 0 and the downward slope slows a negative correlation
* shows a negative correlation
I think you can call it a strong negative correlation.
this is what i put for pt c
The slope is a negative slope that also means negative correlation ( as the time on the internet goes up, scores go down). The y-intercept tells you the approximate score you expect when x=0 ( the score when you spend 0 hours on the internet).
Yes thats good
THANK YOU XOXO :)