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Formula
Solve the equation
Calculate the differentiation
Graph
$y = - 3 x - 15$
$x$Intercept
$\left ( - 5 , 0 \right )$
$y$Intercept
$\left ( 0 , - 15 \right )$
$y = -3x-15$
$x = - \dfrac { 1 } { 3 } y - 5$
 Solve a solution to $x$
$y = \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ x } - 15$
 Move $x$ term to the left side and change the sign 
$y \color{#FF6800}{ + } \color{#FF6800}{ 3 } \color{#FF6800}{ x } = - 15$
$\color{#FF6800}{ y } + 3 x = - 15$
 Move the rest of the expression except $x$ term to the right side and replace the sign 
$3 x = - 15 \color{#FF6800}{ - } \color{#FF6800}{ y }$
$3 x = \color{#FF6800}{ - } \color{#FF6800}{ 15 } \color{#FF6800}{ - } \color{#FF6800}{ y }$
 Organize the expression 
$3 x = \color{#FF6800}{ - } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 15 }$
$\color{#FF6800}{ 3 } \color{#FF6800}{ x } = \color{#FF6800}{ - } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 15 }$
 Divide both sides by the same number 
$\color{#FF6800}{ x } = \left ( \color{#FF6800}{ - } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 15 } \right ) \color{#FF6800}{ \div } \color{#FF6800}{ 3 }$
$x = \left ( - y - 15 \right ) \color{#FF6800}{ \div } \color{#FF6800}{ 3 }$
 Convert division to multiplication 
$x = \left ( - y - 15 \right ) \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 1 } { 3 } }$
$x = \left ( \color{#FF6800}{ - } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 15 } \right ) \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 1 } { 3 } }$
 Multiply each term in parentheses by $\dfrac { 1 } { 3 }$
$x = \color{#FF6800}{ - } \color{#FF6800}{ \dfrac { 1 } { 3 } } \color{#FF6800}{ y } \color{#FF6800}{ - } \color{#FF6800}{ 15 } \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 1 } { 3 } }$
$x = - \dfrac { 1 } { 3 } y \color{#FF6800}{ - } \color{#FF6800}{ 15 } \color{#FF6800}{ \times } \color{#FF6800}{ \dfrac { 1 } { 3 } }$
 Calculate the product of rational numbers 
$x = - \dfrac { 1 } { 3 } y \color{#FF6800}{ - } \color{#FF6800}{ 5 }$
$\dfrac {d } {d x } {\left( y \right)} = - 3$
Calculate the differentiation of the logarithmic function
$\dfrac {d } {d \color{#FF6800}{ x } } {\left( \color{#FF6800}{ - } \color{#FF6800}{ 3 } \color{#FF6800}{ x } \color{#FF6800}{ - } \color{#FF6800}{ 15 } \right)}$
 Calculate the differentiation 
$\color{#FF6800}{ - } \color{#FF6800}{ 3 }$
 그래프 보기 
Linear function
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