Chapter Sections: Topic: Testing a point is on line Vocabulary: A function is a machine that makes a y for every x. The equation of a line can be a function.

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Presentation transcript:

Chapter Sections: Topic: Testing a point is on line Vocabulary: A function is a machine that makes a y for every x. The equation of a line can be a function. her.swf&return_to=Algebra I Activities&title=Function Grapher

Example One Instructions: Test a point to see if it is on the line. Points (x,y) (2,6) (3,5) (4,14) Test (2,6) Test (3,5) True False Test (4,14) True

Classwork One Instructions: Test a point to see if it is on the line. Points (x,y) (2,14) (3,18) (4,24)

Example Two Instructions: Write the point slope form. Slope is Points (x,y) (2,2) and(3,5) +5 Test (2,2) Test (3,5) Slope is 3yint is - 4

y x Example Three Instructions: Make slope triangles to find the slope of the line 3 high 1 wide Points (x,y) (4,4) and(5,7) Slope is 3yint is - 8 slope = high/wide = 3/1 = 3 +7

(2,8) and (3,10) (4,1) and (2,5) (1,6) and (10,6) (1,2) and (4,-1) (6,3) and (5,4) (-7,8) and (-8,5) (55,67) and (50,68) (1,2) and (4,-1) find the slope write the equation of the line in point slope form write the equation of the line in y intercept form test the equation one point test the equation with the other point graph the two point on an (x,y) axis draw the line through the two point draw a slope triangle for the line use the slope triangle to show the slope of the line Classwork Three Instructions: