* * * Same point: they are all straight lines, parallel to each other, passing through the first and third quadrants.

Difference: The former is a proportional function, and the image passes through the origin and only passes through one or three quadrants. The latter image is only the origin, passing through the first, second and third quadrants.

(2)y= 1/2x，y= 1/2x+2。

* * * Same point: they are all straight lines, parallel to each other, passing through the first and third quadrants.

Difference: The former is a proportional function, and the image passes through the origin and only passes through one or three quadrants. The latter image is only the origin, passing through the first, second and third quadrants.

(3)y=3x+2，y= 1/2x+2。

* * * Same point: All straight lines pass through the first, second and third quadrants and pass through the point (0,2).

Different points: different angles of intersection with the coordinate axis (unequal slopes)

For reference! Jiangsu Wu Yunchao wishes you academic progress.