The equation that represents the relationship between the red paint and white paint used is

Linear graph equation is represented by the equation ; y = mx + c
where m is the slope and c is the y intercept.
The slope of the graph shown above is
m = (y₂-y₁)/ (x₂-x₁)
m = 2-0/(3-0)
m = 2/3
therefore the slope of the graph is 2/3
The y intercept is 0 because the line graph intercept the y axis at 0
Therefore, the equation of the relationship is
