Bivariate data quiz
I measure a response variable y at several values of the explanatory variable x, which is “time of measurement.” Plotting log y against time of measurement looks approximately like a straight line with a positive slope. I can conclude that:
| A. | the rate of growth of y is positive but slowing down. |
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B. | since only logs of numbers greater than one are positive, the line best fitted to the plot of y against time would have to have slope greater than one. |
| C. | an exponential curve would fit well to a plot of y against time. |
| D. | I should also take the log of the time variable. |
| E. | I should have taken the log of the time instead of log y. |
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