Desmos Graphing Calculator

CalcReferenceCopy

Math·Algebra·Linear equations in two variables

hard

The graph shows a linear relationship between $x$ and $y$. Which equation represents this relationship, where $R$ is a positive constant?

A

$Rx+21y=63$

B

$Rx-21y=-63$

C

$21x+Ry=63$

D

$21x-Ry=-63$