Um I think the first one is non proportional and the 2nd one is proportional y is 5 times x the 5 might be a negative
If A is a subset of B, then all elements from a set A are in a set B.
The number 8 from {3, 8, 6} is not in the set {1, 2, 3, 4, 5, 6}. Therefore {3, 8, 6} is not a subset of {1, 2, 3, 4, 5, 6}.

Answer:
right pasted the 3 on the number line
Length x width x height
4 x 5 = 20
20 x 6 = 120 cm^3
Answer:
Point form : (9/5 , -16/5)
Equation form : x=9/5 , y=-16/5
Step-by-step explanation: Solve for the first variable in one of the equations, then substitute the result into the other equation.
Hope this helps you out! ☺