Answer:
1.5 liters
Step-by-step explanation:
we have
x ------> the number of days
y -----> the amount of water collected in liters
To find out how much water is collected by day, determine the slope of the linear equation
The formula to calculate the slope between two points is equal to
[tex]m=\frac{y2-y1}{x2-x1}[/tex]
Observing the graph
we have
(0,2) and (4,8)
substitute the values in the formula
[tex]m=\frac{8-2}{4-0}[/tex]
[tex]m=\frac{6}{4}[/tex]
[tex]m=1.5\frac{l}{day}[/tex]
therefore
The amount of water collected is 1.5 liter by day
