Answer:
Option B
Step-by-step explanation:
From the question we are told that:
Demand point
Supply Point
Generally the equation for fixed-requirement constraints is mathematically given by
Therefore the correct option is
help
18
y = - 3
Since y varies directly as x then
y = kx ← ( k is the constant of variation )
to find k use y = - 1 when x = 3
k = = = -
hence y = - x
when x = 9, then
y = - × 9 = - 3