A city planner is making a scale model of his city for his office building. The model has a coordinate grid where each unit is 1 meter. On the grid, the tallest
building is located at (3, 1), the city park is located at (3, 4), and the public
library is located at (4, 4).
The natural history museum is located so that the four buildings make a perfect
rectangle. What is the perimeter around the four buildings on the model?
meters

Here's link to the

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step-by-step explanation:

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a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional