Apoint at (−8, −9) is rotated 270° counterclockwise about the origin. what are the coordinates of the resulting image?

(-9,8)

Step-by-step explanation:

A point at (−8, −9) is rotated 270° counterclockwise about the origin.

Rotation about origin with 270° counterclockwise.

Coordinate change:

Therefore,

The resulting coordinate is (-9,8)

We can also see in attachment for rotation of coordinate.

Hence, The image of coordinate after rotation 270° counterclockwise about origin is (-9,8)

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

circumference divided by 3.141592654 then timesthe radius twice

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice