This table shows the starting and ending temperature for eight days. starting temperature (°f 130 115 100 85 70 55 40 25 ending temperature (°f) 20 24 26 30 32 36 40 42 use the data from the table to create a scatter plot.

For this case, what you should do is use any computational tool and graph the data in the table. For example, I used excel.
 In the x axis we have Starting temperature and in the axis of the y we have Ending temperature.
 You can see how the diagram varies almost linearly.

Just divide the x axis (the top) by 2 or multiply the y axis (the bottom) by 2