Answer:
Solution not exists.
Step-by-step explanation:
Since in a certain step a certain amount divided by zero, an that stage the quentity is undefined. That is if,
Then, at the next stage, is not exists, wheather after it divided by 1 or not. Thus required solution is not exists.
the answer is B: y = 20x on edge.
No
y = 4x + 1 is not a direct variation. Direct variations have the form y = kx. So y = 4x would be a direct variation (k=4), but not y = 4x+1
-5x +15 ≤ 20