135k views
1 vote
What is the equation this proportional relationship?

What is the equation this proportional relationship?-example-1

1 Answer

6 votes

to get the equation of a straight line, we can simply use two points from the line, Check the picture below, let's use those ones.


(\stackrel{x_1}{1}~,~\stackrel{y_1}{2})\qquad (\stackrel{x_2}{3}~,~\stackrel{y_2}{6}) ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{6}-\stackrel{y1}{2}}}{\underset{run} {\underset{x_2}{3}-\underset{x_1}{1}}}\implies \cfrac{4}{2}\implies 2 \\\\\\ \begin{array}ll \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{2}=\stackrel{m}{2}(x-\stackrel{x_1}{1}) \\\\\\ y-2=2x-2\implies y = 2x

What is the equation this proportional relationship?-example-1
User Bjarn Bronsveld
by
7.8k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories