Question

Stats help please?

Answer 1

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. I should also take the log of the time variable
B. The rate of growth of y is positive but slowing down
C. An exponential curve would fit will to a plot of y against time
D. 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.
E. I should have taken the log of the time instead of log y

Answer 2

@rational can you help me with this please?

Answer 3

\[\ln y=mx+b\]

means
\[y=e^{mx+b}\]

so an exponential curve works well for modelling

Answer 4

@rational does that mean it would be C. An exponential curve would fit will to a plot of y against time?

Answer 5

Yes

Answer 6

Ok thank you!