Mathematica isnt accepting my equation

Question

Plot[{[-1.51] + [42.5]*exp [[-3.82]*x]}, {x, 0, 5}] 

is my equation but Mathematica isn't giving me any output...

Answer 1

Here's how to plot your equation. The extra brackets in place of parentheses aren't needed.

Plot[{-1.51 + 42.5 Exp[-3.82 x]}, {x, 0, 5}]

There's a useful guide at What are the most common pitfalls awaiting new users? that might be helpful.

Answer 2

WL commands are capitalized. Brackets cannot be used as parentheses.

Plot[{-1.51 + 42.5*Exp[-3.82*x]}, {x, 0, 5}]