Before you continue with your paper, it is a good idea to review your outline. Check the elements that you included in your outline. I included my thesis statement in the introduction. I created topic sentences. I included transitions between the introduction, body, and conclusion. I found evidence to support each paragraph. I used numbers and letters to indicate paragraphs and details. I included an idea for a conclusion.

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

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: