Answer:
The equation of the relation ⇒ 
y = 18
Step-by-step explanation:
∵ y ∝ x/z
∴ y = kx/z
∵ y = 18 , x = 15 and z = 5
∴ 18 = 15k/5 ⇒ 18 = 3k
∴ k = 18/3 = 6
∴ y = 6x/z
∵ x = 21 and z = 7
∴ y = (6 × 21)/7 = 18
The domain is all real numbers except kπ, where k is an integer.
The range is (-∞, -1] ∪ [1, ∞)
Vertical asymtote is kπ, where k is an integer.
X - number of customers

There can't be a fraction of the number of people, so there must be some mistake in the question.
<span />
Step 1. (5+4-2)x(-2)
Step 2. (7)x(-2)
Step 3. -14
Answer:
0.6. That's the Answer sir
Step by Step Explaining:
None.