1, function model and its application: compare the growth differences of exponential function, logarithmic function and power function with calculation tools; Combined with examples, we can understand the meaning of growth of different function types such as linear rise, exponential explosion and logarithmic growth. Collect some examples of function models (exponential function, logarithmic function, power function, piecewise function, etc.). ) It is often used in social life to understand the wide application of functional models.

2. In the plane rectangular coordinate system, combined with specific graphics, explore and determine the geometric characteristics of the straight line position.

3. Understand the concepts of inclination angle and slope of a straight line, experience the process of describing the slope of a straight line by algebraic method, and master the calculation formula of the slope of two points of a straight line.

4. According to the geometric characteristics of determining the position of a straight line, explore and master several forms of linear equation (point-oblique type, two-point type and general type), and understand the relationship between oblique type and linear function.

5. According to the slope, it can be judged whether two straight lines are parallel or vertical.