Graph Using a Table of Values y=e^(-x)

$y = e^{- x}$

Step 1

Substitute $- 2$ for $x$ and find the result for $y$ .

$y = e^{- (- 2)}$

Step 2

Multiply $- 1$ by $- 2$ .

$y = e^{2}$

Step 3

Substitute $- 1$ for $x$ and find the result for $y$ .

$y = e^{- (- 1)}$

Step 4

Simplify $e^{- (- 1)}$ .

Multiply $- 1$ by $- 1$ .

$y = e^{1}$

Simplify.

$y = e$

Step 5

Substitute $0$ for $x$ and find the result for $y$ .

$y = e^{- (0)}$

Step 6

Simplify $e^{- (0)}$ .

Multiply $- 1$ by $0$ .

$y = e^{0}$

Anything raised to $0$ is $1$ .

$y = 1$

Step 7

Substitute $1$ for $x$ and find the result for $y$ .

$y = e^{- (1)}$

Step 8

Simplify $e^{- (1)}$ .

Multiply $- 1$ by $1$ .

$y = e^{- 1}$

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$y = \frac{1}{e}$

Step 9

Substitute $2$ for $x$ and find the result for $y$ .

$y = e^{- (2)}$

Step 10

Simplify $e^{- (2)}$ .

Multiply $- 1$ by $2$ .

$y = e^{- 2}$

Rewrite the expression using the negative exponent rule $b^{- n} = \frac{1}{b^{n}}$ .

$y = \frac{1}{e^{2}}$

Step 11

This is a table of possible values to use when graphing the equation.

$\begin{array}{c} x & y \\ - 2 & e^{2} \\ - 1 & e \\ 0 & 1 \\ 1 & \frac{1}{e} \\ 2 & \frac{1}{e^{2}} \end{array}$

Step 12

Graph Using a Table of Values y=e^(-x)

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