Y = 12x is a direct variation which is a proportion.
As x increases y also increases.
Answer:

Step-by-step explanation:
There are

different ways to select the four numbers between 1 and 42. Only one of this ways is correct (successful to win).
There are 30 different ways select the single number between 1 and 30. Only one of them is correct.
The probability of winning the jackpot is

All triangles angles in the inside add up to 180, so 180-76-72=32
B = √(14² - 9²) = √(196-81) = √115 ≈ 10.7 units