Click here to get an image of just the question without the rest of this page. This is handy if you are going to print the graph to actually draw the tangent line. You could hold a ruler to the graph on the screen.

Draw a line such that it is long and touches the curve near the point of interest at only on spot. (Do not worry about the fact that this line also touches the line later in the curve.)

Here's the math to calculate the tangent's slope.

Pick two points on the tangent that go through corners of the grid AND are far apart. Use them to find the slope.