1. Generate a list of points for the relationship.

You should have created a table to obtain some points. A sample using 0, 1, 2, and 3 for x is shown in the table.

x	y
0	2
1	4
2	6
3	8

To obtain y values, plug the x values into the equation y = 2x + 2 and compute.

x = 0 y = 2 (0) + 2 y = 0 + 2 y = 2

x = 1 y = 2 (1) + 2 y = 2 + 2 y = 4

x = 2 y = 2 (2) + 2 y = 4 + 2 y = 6

x = 3 y = 2 (3) + 2 y = 6 + 2 y = 8

The points that we have defined here are:

(0, 2), (1, 4), (2, 6), (3, 8)

1. Draw a set of axes and define the scale.
   This part was done for you in the problem. Copy the axes provided in the practice problem.

Plot the points on the axes. Next, plot the following points (0, 2), (1, 4), (2, 6), (3, 8) on a set of axes. NOTE: Regardless of the points you selected, your graph of the line will still be the same. Draw the line by connecting the points. Once you have plotted the points, connect them to get a line.

What if your graph does not look like this? If your graph does not look like the one shown here, read through the suggestions below to determine where you may have made a mistake.

If any of your points do not lie on your straight line:

• Check your calculations for an error in computing y values. You should have be at least three of the following points: (0, 2), (1, 4), (2, 6), (3, 8)
• If you have problems doing these calculations, reread how to generate a list of points and then go to the additional practice for this unit.
• Remember that points are given in the coordinate notation of (x, y), with x first and y second. If you had problems with this notation, reread the section in unit two on coordinates of points in Part One and the beginning of this unit, and then go to the additional practice for this unit.
• Check to be sure all of your points are plotted correctly. If you have problems plotting the points, reread the section in unit two on plotting points and then go to the additional practice for this unit.

IMPORTANT: You should always plot at least three points before drawing your line. This serves as an extra check because if one points does not lie on your line, you made a mistake somewhere.

If your graph looks like the one shown here you have switched your x and y values when plotting. Remember that points are given in the coordinate notation of (x, y), with x first and y second. Be sure that you plotted the points correctly. If you do not understand how plotting of points is done, reread the section on plotting points in the second unit and then go to the additional practice for this unit.

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