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March 6, 2015

Posted by **Mara** on Wednesday, October 19, 2011 at 12:09am.

frind the derivative of each function at the given number.

21. f(x)= -4x + 5 at 3

22. f(x)= -4 + 3x at 1

thanks

- College math -
**Reiny**, Wednesday, October 19, 2011 at 12:33amBoth of your equations are straight lines.

So they have the same slope no matter where you are on the line

21. y = -4x + 5

compare with y = mx + b, where m is the slope

slope = -4

let me know what you got for 22.

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