Asked by Mara

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

thanks
Answered by Reiny
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.