answer: 7 x 2/5 = 2.8 hours, is your answer. your welcome! : 3
step-by-step explanation: first work out how long it took to hose 1/7 of the lawn which is 2/5 hours. times that by 7 to get the whole lawn.
sorry i don't know the other answer. i didn't learn what a proportional relationship is.
there are infinitely many solutions.
a solution is a point of intersection and graph b neither of the lines intersect.