Part A
Condo: $2.2 million / 1946 sq feet
Let
y ----> total cost in dollars
x ---> Square Footage
the equation is of the form
y=kx
where
k is the constant of proportionality
k=y/x
k=2,200,000/1,946=$1,130.52 per square footage
therefore
the equation for the total cost of a Condo is
y=1,130.52x
Part B
House : $.3 million / 4681 sq feet
Let
y ----> total cost in dollars
x ---> Square Footage
the equation is of the form
y=kx
where
k is the constant of proportionality
k=y/x
k=300,000/4,681=$64.09 per Square Footage
therefore
the equation for the total cost of a house is
y=64.09x