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On a two-dimensional graph representing two variables:
O a. a negative slope of a curve means the two variables are positively related.
O b. a pojitive slope of a curve means the variables are negatively related.
O c. Ã line that is vertical has a zero slope.
O d. a line that is horizontal has a zero slope.
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On a two-dimensional graph representing two variables:
O a. a negative slope of a curve means the t...
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