Is Growth of real GDP is a measure of economic progress.

Economic growth is the increase in the market value of goods and services produced by an economy over a period of time. It is measured as the percentage rate increase in the real gross domestic product (GDP). On a global scale, economic growth is the sum of the growth of individual countries to give a worldwide total.

expression #3 is not equivalent. the others are.

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