**1. Can a time series graph have curves?**

Yes, but usually the points on the graph are joined by straight lines.

**2. Does TIME always have to go on the horzontal axes of a time series graph?**

Yes, time is

always on the horizontal axes.

**3. Is it best to use moving means or moving medians when smoothing a curve?**

A

moving meanof order 5 uses ALL 5 of the values so will be effected by any extremely high or low values, whereas amoving medianof order 5 is not effected by extreme values.