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College math

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Please, help me with this problem:
frind the derivative of each function at the given number.

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

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


  • College math -

    Both 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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