The unit rate is the slope of the line. To find the slope from a graph, do this. Find the x- and y-coordinates of two points. Subtract the y-coordinates. Subtract the x coordinates in the same order. Divide the first difference by the second difference. That is the slope and the unit rate.
The total amount of lawns to be mowed would be 20 in 35 hours.
Step-by-step explanation:
It takes an hour and 45 minutes to mow one lawn. When you multiply the 7 hours by 5 you get 35 hours. Same thing if you multiply the 4 lawns by 5 you get 20 lawns.