Find the slope containing the points (9, 3) and (4, 2)

1/5

Step-by-step explanation:

We can find the slope when we are given two points by using

m = (y2-y1)/(x2-x1)

    = (2-3)/(4-9)

    = -1/-5

    = 1/5

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