The complete question in the attached figure
we know that
the range is the y-value of the function
so
the lowest y-value on this graph is y = -2.
the answer is
y=-2
Slope = 0
b = 5
equation
y = 5
30, it’ll take 30 men to dig 8 hactares in 12 days.
all you have to do is see whether both variables of each point meet both contraints:
for a) 1<3 and 2>1 is true so a is a solution to the system