Fran is training for a marathon and she wonders if she will receive better training is she runs with a group rather than on her own . She wants to know if there is a significant difference in the number of miles run each week between group runners and individual runners . The interviews 32 people that she knows train in groups , and finds that they average 49 miles per week with a standard deviation of 4.2 miles . The also interviews 30 people who she knows that train on their own and finds that they runon average 47.2 miles per week with a standard deviation of 4.8 miles . Test Fran's claim at .05

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explanation

the graph has a slope of 1/3 because each time you move up 1, you go to the right 3. so, slope = rise/run = 1/3. we can cross choice a off the list since we want a slope of 3, rather than 1/3.

the first table shown has a slope of -3. this is because the rise is -6 and the run is 2, so slope = rise/run = -6/2 = -3. note how x increases by 2 each time (run) and y drops by 6 each time (rise). choice b can be eliminated.

the second table has a slope of 3. each time x goes up by 1, the y values increase by 3. slope = rise/run = 3/1 = 3. alternatively you can use the slope formula to prove that the slope is 3 here. use any two rows of values to generate the two points. choice c is one of the answers

the third table also has a slope of 3. let's use the slope formula to prove as such. i'm going to use the first two rows of the table. so i'll use the two points (2,1) and (5,10)

m = slope

m = (y2-y1)/(x2-x1)

m = (10-1)/(5-2)

m = 9/3

m = 3 so we get a slope of 3

choice d is the other answer

10

step-by-step explanation:

135 is your answer

step-by-step explanation:

try 180 times three then divide that number by 4 (sides) to get your answer. im glad to : )

answer: hey there,

the answer you are looking for is a..

hope this you!