Answer:
It does not show variation
Step-by-step explanation:
Given

Required
Determine if there's direct variation between x and y
The general form of direct variation is:

Make y the subject of formula in the given parameters;


Compare
to 
<em>Since they are not of the same form, then the given equation do not show direct variation</em>
Answer:
Here's the answer
Step-by-step explanation:
Dividing the number by 1000
Answer:
57.1
Step-by-step explanation:
Using cosine rule
Cos¤ = 21/25
Cos¤ = 0.84
¤ = 57.12 appropriately 57.1
-9/5 or -1.8
2 - - 3 = 5
-5 - 4 = -9
Linear: y = 4/-7 x + 4
Standard: (4/7)x + y = 4