Read and interpret a straight-line graph
The horizontal variable is time; the vertical variable is water collected
The horizontal axis is measured in minutes. The line passes through \(A(5, 11)\) and \(B(6, 12)\)
The vertical axis is measured in litres
\[y = 6 + x\]
Treat the drawn segment as the known interval for this exercise. Beyond it, assume the same linear model continues only while the quantities remain physically possible. The stated coordinates and rule use graph units