Answer:option 1 and option 2 represents a direct variation.
Explanation:
A direct variation is one in which, as one variable increases in value, the other variable increases in value. Also as one variable decreases in value, the other variable decreases in value.
Looking at the options,
1) y = 2х
When x = 2, y = 2×2 = 4
When x = 3, y = 2×3 = 6
Therefore, y = 2x is a direct variation.
2) y=x+4
When x = 2, y = 2 + 4 = 6
When x = 3, y = 3 + 4 = 7
Therefore, y = x + 4 is a direct variation.
3) y= 1/2x
When x = 2, y = 1/2×2 = 1/4 = 0.25
When x = 3, y = 1/2×3 = 1/6 = 0.17
Therefore, y = 1/2x is not a direct variation.
4) y = 3/x
When x = 2, y = 3/2 = 1.5
When x = 3, y = 3/3 = 1
Therefore, y = 3/x is not a direct variation.