Well, you have to simplify the bottom part to be able to answer it as a whole number. Hope this helps.
I believe that the answer is the first one
(0−30)÷4×6
-30÷4×6
-7.5×6
-45
i hope this helps!
60cm is the length from A and B
Pick any value in the y column of the table. I'm going to pick 81. Divide the value you picked by the previous y value, which in my case would be 9
Dividing the values gives: 81/9 = 9
So the base is 9. We multiply each y value by 9 to get the next y value
Eg: to go from 1/81 to 1/9, we multiply by 9. Same for 1/9 to 1, and so on.
Answer: Choice B) 9
Note: This trick only works because x is increasing by 1 each time
