Vinegar is the x or horizontal oil is the y or vertical
![\frac{3}{2} = \frac{y}{x} \\ 3x = 2y \\ y = \frac{3}{2} x](https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B2%7D%20%20%3D%20%20%5Cfrac%7By%7D%7Bx%7D%20%20%5C%5C%203x%20%3D%202y%20%5C%5C%20y%20%3D%20%20%5Cfrac%7B3%7D%7B2%7D%20x)
the point represent the amount of vinegar and oil so for 1 tbsp vinegar you need 1.5tbsp oil
Answer:
X=4
Step-by-step explanation:
![3x + 6 = 18 \\ 3x = 18 - 6 \\ 3x = 12 \\ x = 4](https://tex.z-dn.net/?f=3x%20%2B%206%20%3D%2018%20%5C%5C%203x%20%3D%2018%20-%206%20%5C%5C%203x%20%3D%2012%20%5C%5C%20x%20%3D%204)
If functions transfer some a to b via some formula, then inverse of such functions transfer b to a via some other formula.
Hope this helps.