Yes it is a direct variation
Answer:

Step-by-step explanation:
Eqn. 1 ----> 4y = x
Eqn. 2 ----> 5x-10y = -50
(Simplifying eqn.2 further)


(Substituting the value of x from eqn. 1)



Now, substituting the value of y in eqn. 1 ,

Answer:
Hey there!
First, let's identify the point. We always go x axis first, then y axis, so the point is at (3, 8).
From the graph, we see that it means the tree is 8 feet tall and three years old.
Let me know if this helps :)
Answer:
I think its c
Step-by-step explanation:
I'm pretty sure you need decimals to make it an irrational number
Answer:10 Seconds
Step-by-step explanation:
s=1600 ft
t=√(s) /4
t=√(1600)/4
t=40/4
t=10 seconds