228k views
0 votes
Question

The value of y varies directly as a, and y = 2 when x = 8. Find the equation represents this relationship.

User SHernandez
by
7.8k points

1 Answer

6 votes

Answer: y = 0.25x

Optionally you can replace 0.25 with the fraction 1/4

===================================================

Step-by-step explanation:

The variable y varies directly with x, which means we have the template of y = kx for some constant k.

Plug in x = 8 and y = 2. Then solve for k

y = kx

2 = k*8

8k = 2

k = 2/8

k = 1/4

k = 0.25

Therefore, we go from y = kx to y = 0.25x

-------------

Check:

Plugging in x = 8 should get us to y = 2

y = 0.25x

y = 0.25*8

y = 2

The answer is confirmed.

User Namford
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories