How to draw a function image in the second volume of junior high school mathematics

Drawing method of linear function image in the second volume of junior middle school mathematics;

1. Take any two points on the function image;

Second, draw a straight line with a ruler after these two points to get an image of a linear function.

Example: Draw an image with the function y=2x+6.

Solution: 1. Take A (0 0,6) and b (-3,0);

2. Draw a straight line through point A and point B,

Then the straight line AB is the image of the linear function y=2x+6.