When a dot is used over a number in an inequality graph, what is true about the number? a. the number is not an answer to an inequality.
b. the number is greater than the variable.
c. the number is an answer to the inequality.
d. the number is less than the variable.​

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

answer: 819.89 miles across america

step-by-step explanation:

yes

step-by-step explanation:

they have to be opposite and reciprocal of eachother.