The function y = 7x is a straight line with a slope of 7, and it passes thru the origin (0, 0)
To determine a second set of points so that you can connect them in order to sketch the line, pick some random values of x and y.
For example, let x = 1, then y = 7x = 7 * 1 = 7
Now, we have two points on the line: (0, 0) and (1, 7). With this information, you should now be able to sketch the graph of y = 7x, Kate.
To estimate the distance after 4.5 hours, simply replace x in the function with 4.5
y = 7x = 7 * 4.5 = 31.5 miles
