Question : What is the equation of the line if its slope is $\frac{–2}{5}$ and it passes through the point $(1,–3)$?
Option 1: $2x+5y=17$
Option 2: $2x–5y=–13$
Option 3: $2x–5y=17$
Option 4: $2x+5y=–13$
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Correct Answer: $2x+5y=–13$
Solution :
Given: Slope = $-\frac{2}{5}$
Passing through the point $(1,–3)$.
The equation of the line with slope $m$ is $y=mx+c$
Putting the values of $m$ and $(x,y)$,
⇒ $ –3= -\frac{2}{5}×1+c$
⇒ $c= \frac{2}{5}-3$
⇒ $c=-\frac{13}{5}$
So, the equation is $y=-\frac{2}{5}x+(-\frac{13}{5})$
⇒ $5y=–2x–13$
⇒ $2x+5y=–13$
Hence, the correct answer is $2x+5y=–13$.
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