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Formula
Solve the equation
Calculate the differentiation
Graph
$y = - x - 1$
$x$-intercept
$\left ( - 1 , 0 \right )$
$y$-intercept
$\left ( 0 , - 1 \right )$
$y = -x-1$
$x = - y - 1$
 Solve a solution to $x$
$y = \color{#FF6800}{ - } \color{#FF6800}{ x } - 1$
 Move $x$ term to the left side and change the sign 
$y \color{#FF6800}{ + } \color{#FF6800}{ x } = - 1$
$\color{#FF6800}{ y } + x = - 1$
 Move the rest of the expression except $x$ term to the right side and replace the sign 
$x = - 1 \color{#FF6800}{ - } \color{#FF6800}{ y }$
$x = \color{#FF6800}{ - } \color{#FF6800}{ 1 } \color{#FF6800}{ - } \color{#FF6800}{ y }$
 Organize the expression 
$x = \color{#FF6800}{ - } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 1 }$
$\dfrac {d } {d x } {\left( y \right)} = - 1$
Calculate the differentiation of the logarithmic function
$\dfrac {d } {d \color{#FF6800}{ x } } {\left( \color{#FF6800}{ - } \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 1 } \right)}$
 Calculate the differentiation 
$\color{#FF6800}{ - } \color{#FF6800}{ 1 }$
 그래프 보기 
Linear function
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