"Application of graphs of linear functions" linear function PPT courseware 4

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"Application of graphs of linear functions" linear function PPT courseware 4

As shown in the figure, l1 reflects the relationship between sales revenue and sales volume of a company's products. Fill in the blanks according to the diagram:

(1) When the sales volume is 2 tons, sales revenue = ______ yuan;

(2) When the sales revenue is 6,000 yuan, the sales volume = ______ tons.

As shown in the figure, l1 reflects the relationship between the sales revenue and sales volume of a company's products, and l2 reflects the relationship between the sales cost and sales volume of the company's products. Fill in the blanks according to the diagram:

(1) When the sales volume is 2 tons, sales revenue = _____ yuan, sales cost = _____ yuan;

(2) When the sales volume is 6 tons, sales revenue = _____ yuan, sales cost = _____ yuan;

(3) When sales volume equals _____, sales revenue equals sales cost;

The meaning of the intersection of two straight lines:

(1) Geometric meaning: The intersection of two straight lines is their common point;

(2) Algebraic meaning: The coordinates of the intersection of two straight lines satisfy two analytical expressions at the same time.

How to compare function values ​​using images:

(1) First find the coordinates of the intersection point, y1=y2 at the intersection point;

(2) Looking at the left and right sides of the intersection, the straight line function value at the top of the image is larger.

The figure shows the function graph of distance and time when A is riding a bicycle and B is riding a motorcycle along the same route from A to B. The two places are 80 kilometers apart.

(1) Who sets off earlier? How early? Who arrived at point B earlier? How early?

(2) What are the speeds of the two people on the way?

(3) Indicate during what time period both people were traveling on the road (excluding the two end points)? A is driving in front of B; A and B meet; A is driving behind B.

An electrical machine factory wants to print product promotional materials. Printing Factory A proposes: a printing fee of 1 yuan for each material and an additional 1,500 yuan for plate making; Factory B proposes: a printing fee of 2.5 yuan for each material and no plate making fee. .

(1) Write down the relationship between the charge y (yuan) and the printing quantity x (copies) of the two factories respectively;

(2) Make their images in the same rectangular coordinate system;

(3) Answer the following questions based on the images: When printing 800 copies of promotional materials, which printing house is more cost-effective to choose? The TV manufacturer plans to spend 3,000 yuan on printing promotional materials. Which printing factory can we find to print more promotional materials?

Class summary

1. The meaning of the intersection of two straight lines:

(1) Geometric meaning: The intersection of two straight lines is their common point;

(2) Algebraic meaning: The coordinates of the intersection of two straight lines satisfy two analytical expressions at the same time.

2. Method of comparing function values ​​using images:

(1) First find the coordinates of the intersection point, y1=y2 at the intersection point;

(2) Looking at the left and right sides of the intersection, the straight line function value at the top of the image is larger.

Keywords: primary function courseware, primary function graph application courseware, Beijing Normal University edition eighth grade mathematics volume PPT courseware, eighth grade mathematics slide courseware download, primary function PPT courseware download, primary function graph application PPT courseware download, .ppt format

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Update Time: 2024-10-05

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