Final answer:
To proportionally resize a chart, hold the Shift key while dragging. The Zoom key on a calculator fits the window to data for graphing, and the Y= key is used to graph the equation for a best-fit line.
Step-by-step explanation:
To resize a chart proportionally, you need to hold the Shift key while dragging a corner handle. This method ensures that the chart's aspect ratio is maintained as you adjust its size.
In other contexts, proportionally resizing might involve different keys or actions, depending on the software you are using.
In the context of graphing statistical data with a calculator, such as when using a TI calculator, you may use different functions.
For instance, the ZOOM key is used for adjusting the view of the graph. Specifically, you can press the ZOOM key and then the number 9 (for menu item ZoomStat) to fit the window to the data.
To graph a best-fit line, you would press the Y= key and enter the equation into Y1, which in this case is -173.5+ 4.83X. Afterwards, you would press ZOOM 9 again to graph the best-fit line with the newly adjusted window.