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Computing Derivatives

Computing Derivatives

Lines

We've seen lines before. The restroom at half-time, the blue things on notebook paper...and they were all over algebra. y = mx  +  b, anyone? Lines are a special case of polynomials. Once we master them, we'll be ready to add some power. As in the power of 2. Not rangers.

Lines have a constant slope. If we write our line as y = mx + b, the slope will be m. But wait, isn't there a relationship between slope and derivative?

Yeah, they're kinda the same thing. Since lines have a constant slope the derivative of any line will just be m.

To recap, if f(x) = mx + b is a line, then f ' (x) = m. The derivative will be constant, and equal to the slope of the line for every value of x.

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