Answer:
Okay, let's break this down step-by-step:
y varies directly with x, meaning y is proportional to x.
This can be expressed as y = kx for some constant k.
We are given: When x = 8, y = 104.
Substituting the given values: 104 = k(8)
Solving for k: k = 104/8 = 13
Now we want to find y when x = 18. We use the proportional relationship:
y = kx
= 13(18)
= 234
Therefore, when x = 18, y = 234.
Explanation: