Answer:
y = 8
Step-by-step explanation:
Direct variation formula is y=kx. Plus in the known x & y values to solve for k, the constant of proportionality.
16 = k (4) Divide by 4 to solve
4 = k
This means we multiply x by 4 to get y.
y = kx
y = 4 (2)
y = 8
The value of y in these ordered pairs (4, 16) and (2, y) is 8.
Let there are two variables p and q
Then, p and q are said to be directly proportional to each other if
p = kq
where k is some constant number called the constant of proportionality.
If y varies directly as x,
16 = k (4)
Divide by 4 to solve for k
4 = k
This means we multiply x by 4 to get y.
y = kx
y = 4 (2)
y = 8
Hence, the value of y in these ordered pairs (4, 16) and (2, y) is 8.
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