"Preliminary Application of Functions" PPT

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"Preliminary Application of Functions" PPT

Part One: Introduction of New Course

1. During a change process, the quantity whose value changes is called ________, and the quantity whose value remains unchanged is called ________.

2. Generally speaking, in a change process, if there are two variables x and y, and for the ________ of x, y is ________, then y is said to be a function of x. where x is the independent variable.

3. The general steps for drawing the graph of a function using the point tracing method: ________, ______________.

4. There are three ways to represent functions: ________. _______________________.

A candle is 20cm long and burns 5cm per hour after it is lit. The following three images can roughly depict the functional relationship between the remaining length h (cm) of the candle after it is lit and the lighting time t. ( ) .

discuss

Discussion: Outline (1), (2)

Check answers and standard format

Discuss how to find patterns to determine expressions from numerical tables

Group Proposal: Outline (3)

Determine the endpoint of the segment based on the independent variables and write the relationship expression

Preliminary Application of Functions PPT, Part 2: Classroom Development

A wholesale department conducted an investigation on an electronic component distributed and found that the functional relationship between the profit y (yuan) of a day and the sales volume x (units) of the day is as shown in the figure. Please observe the image and answer:

(1) How many electronic components sold in a day can make the most profit, and what is the maximum profit?

(2) How much of this kind of electronic component can be sold in a day without losing money or making a profit?

The perimeter of an isosceles triangle is 12cm, let its base length be ycm and its waist length be xcm.

(1) Write the functional relationship between y and x, and point out the value range of the independent variable x;

(2) Draw the graph of this function.

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for the second volume of eighth grade, preliminary application of functions PPT download, .PPT format;

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"Preliminary Application of Functions" PPT courseware:

"Preliminary Application of Functions" PPT courseware Part One Content: Teaching Objectives 1. Be able to analyze the relationship between variables from images, find corresponding realistic situations, predict changing trends and other issues. 2. Be able to use function models to solve simple practical problems and improve mathematical application...

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Update Time: 2024-11-23

This template belongs to Mathematics courseware Hebei Education Edition Eighth Grade Mathematics Volume 2 industry PPT template

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