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Graph one shows a number of observations that are very spread out but generally trending from the top left of the graph to the bottom right. Graph two has a number of observations that would be tightly packed around a trend line sloping from the bottom left to the top right. Which of the following statement(s) are true?
a) Graph one should have a higher r-squared value
b) Graph two should have a higher r-squared value
c) Graph one has a positive slope
d) Graph two has a negative slope
e) A and C
Please explain
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