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Let the voltage be fixed in a closed circuit, the current I(A) and the electronic resistance R(Ω)

are inversely proportional. The graph shows the relationship between them. The equation is _____________.

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As shown in the figure, point P is on one branch of an inverse proportional function. Given

the area of the rectangle PEOF is 3. The equation for this graph is _______________.

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国际0.5 Combination of linear function and inverse proportional function

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国际0.5 Combination of linear function and inverse proportional function

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Given the line y=x and the hyperbola y= (k>0) intersect at point A and B. The x-coordinate of point A is 4.

(1) Find the value of k;

(2) Suppose point C is on the hyperbola and its y-coordinate is 8. Find the S△AOC.

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Given the graph of a line y=k₁x+b intersects with a hyperbola y= at point A(1, 2) and intersects with x-axis at point B(2, 0). Write the equations for the line and the hyperbola.

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The graph of  and the graph of  have 2 intersections. Find the coordinates of the intersections.

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9. a) As shown in the figure, point A is on the graph of  and AB forms a line perpendicular to the x-axis. When AB moves on the curve, does the area of △AOB change? Yes or No

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b) A, B are on the graph of  ( ), and P is on the line AB.

Let S₁ be the area of △AOC, S₂ be the area of △POE, S₃ be the area of △BOD. Compare S₁, S₂, S₃. __________________

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c) A is on the graph of , and B is on the graph of  .

AB is parallel to the x-axis, AD, BC are perpendicular to x-axis. Write an expression for the area of rectangle ABCD ___________.

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请同学们举例相交线在生活中的应用

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请同学们举例相交线在生活中的应用

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请同学们举例垂线在生活中的应用

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请同学们举例垂线在生活中的应用

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Activity：

Using The GeoGebra to demonstrate, what is the relationship between corresponding angles, alternate interior angles, and interior angles on the same side when two parallel lines are cut by a third line?

使用GeoGebra演示，两条平行线被第三条直线所截，形成的同位角，内错角，同旁内角之间有什么关系？