According to a legend the Chinese emperor yu Huang saw a magic square on the back of a turtle. In a magic square on the back of a turtle. In a magic square, the numbers in each column gave the same sum. This sum is called the magic sum. Copy and complete the magic square so that each row and each column has a magic sum of 0. Use each integer from -4 to 4 exactly once

rectangle that is ther answer you

step-by-step explanation:

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