Algebra, Apps, My Grapher

My Grapher Tutorial: Tangent Lines

You can use My Grapher to calculate a line tangent to a curve at a given point. Note: In this tutorial, “iPhone” refers to either an iPhone or an iPod touch.

1. iPad: Tap the + button and type in an equation for a curve. iPhone: Tap the list icon, then tap the + button to type in an equation for a curve.

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2. If you graphed the equation shown above, you should get a graph like this:

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3. iPad: Tap the gear icon, then tap Values. Choose Calculus from the two tabs at the top. iPhone: Tap and hold the graph, then tap Function Tool. Choose Calculus from the two tabs at the bottom. The options should look like this:

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4. Tap X Value to choose which point the line should be tangent to. On iPhone, type the number in with the number keyboard.

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5. Tap Done, and an equation should appear below the X Value option. Tap the equation to graph it.

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I hope this helps you use My Grapher more effectively! Please leave a comment if you have any questions.

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