Tangent Line and Normal Line

Can someone help me with this matlab script please.

[Dyuman Joshi]

> Use diff, instead of defining the first derivative manually. Same for y0 and m, use the variables to obtain the corresponding values. DO NOT hard-code values.

> Use fplot over ezplot

[Sam Chak]

Is there a MATLAB function to find the normal line directly from the given coefficients? I believe we can do that using matrix algebra and rotation matrix.

Update:

Tangent line:

Normal line:

Answer 1

[VBBV]

f(x) = x^3 - 3*x + 2 

instead of

f(x) = 3^x - 3*x + 2 

[VBBV]

The function input for f(x) is incorrect