tan ?

**marlene** · December 18th 2012, 09:34 PM

how to figure slope and tan

**Soroban** · December 18th 2012, 09:47 PM

Hello, marlene!

What are we given?

**HallsofIvy** · December 19th 2012, 02:12 PM

If you are given two points $(x_0, y_0)$ and $(x_1, y_1)$ , then the slope of the line through those two points is given by $\frac{y_1- y_0}{x_1- x_0}$ . If you are given an equation, say Ax+ By= C, you can solve for y, getting $y= -\frac{A}{B}x- \frac{C}{B}$ and the slope is $-\frac{A}{B}$ .

Those formulas are given in any Calculus text aren't they?

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