The value of y when x=8 and z = 1/4 is 1 based on the joint variation
<h3>How to determine the value of y?</h3>
The variation is given as
A joint variation
Such that y varies jointly as x and z
This means that
y = kxz
Where k is the constant of variation
From the question, we have
y=15 when x=5 and z=6
This means that
15 = k * 5 * 6
So, we have
15 = 30k
Evaluate
k = 0.5
Substitute k = 0.5 in y = kxz
y = 0.5xz
When x=8 and z = 1/4, we have
y = 0.5 * 8 * 1/4
Evaluate
y = 1
Hence, the value of y is 1
Read more about variation at
brainly.com/question/6499629
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