"Primary Function" PPT courseware

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"Primary Function" PPT courseware

Import new lesson

We have learned some knowledge about linear functions and how to determine the analytical formula. How can we use the knowledge of linear functions to solve related practical problems?

After Xiaofang started running at a speed of 200 meters/min, she first ran at a constant speed for 5 minutes, increased her speed by 20 meters/min every minute, and then ran at a constant speed for 10 minutes. Try to write down the functional relationship between her running speed y (meters/minutes) and the running time x (minutes) during this period, and draw a graph.

collaborative inquiry

City A has 200 tons of fertilizer, and City B has 300 tons of fertilizer. Now all these fertilizers need to be transported to townships C and D. The cost of transporting fertilizer from city A to townships C and D is 20 yuan and 25 yuan per ton respectively; the cost of transporting fertilizer from city B to townships C and D is 15 yuan and 24 yuan per ton respectively. Now Township C needs 240 tons of fertilizer, and Township D needs 260 tons of fertilizer. How to arrange shipments with the lowest total freight?

Through analysis and thinking, we can find that there are 4 variables involved in transporting fertilizer: A──C, A──D, B──C, B──D. They are all variables that affect the total shipping cost. However, there is a certain inevitable connection between them. As long as one of the quantities is determined, the other three quantities will also be determined.

Consolidate training

As shown in the figure, y1 reflects the relationship between the sales revenue and sales volume of a company's products, and y2 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 5 tons,

Sales revenue = _________ yuan, sales cost = _________ yuan;

Can you do it by studying this lesson?

1. Able to obtain information through function graphs and develop image thinking.

2. Be able to use function graphs to solve simple practical problems and develop mathematical application abilities.

Keywords: One-time function courseware, New People's Education Edition eighth-grade mathematics PPT courseware, eighth-grade mathematics slide courseware download, one-time function PPT courseware download, .ppt format

For more information about the PPT courseware "Linear Function", please click the "Linear Function ppt" tab.

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Update Time: 2024-10-02

This template belongs to Mathematics courseware People's Education Press Eighth Grade Mathematics Volume 1 industry PPT template

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