Notice that e^(-2) means that x=-2 in the function y=e^x.
y≈ 0.1353
Practice makes perfect
To draw y=e^x, first push the button Y= and enter the equation in the first row. We can write e on a calculator by pushing 2nd and $÷$.
Having entered the function, we press the GRAPH button to draw it on a coordinate plane.
To find the value of e^(-2), we can use the trace feature to find the value of the function at x=-2. This can be done by pressing 2nd, TRACE, and choosing the value option. Finally, enter -2 and it will give you the value of e^x when x= -2.
Rounded to four decimal places, the value of e^(-2) is 0.1353.
