I'm not sure if this is right but
The graphic you are looking for looks like the one shown in the attached figure.Remember that to graph a line you need two points, which you give them. The equation of the line you are looking for in this case will be given by y = 2x + 1
The percentage of yellow tint in the new mixture will be 39.1304...%
<em><u>Explanation</u></em>
A mixture of 60 liters of paint is 25% red tint, 30% yellow tint and 45% water.
So, the amount of yellow tint liters.
Now, 9 liters of yellow tint are added to the original mixture. So, the <u>total amount of yellow tint in the new mixture</u> will be: liters.
And the <u>total amount of the new mixture</u> will be: liters.
So, the percentage of yellow tint in the new mixture
I think 8.0km is the answer