section 2.1 graphs
DESCRIPTION
Section 2.1 Graphs. Points & Ordered Pairs ( x,y ) Quadrants I II III IV Solutions to Equations x-intercepts Nonlinear Equations. Points and Ordered Pairs. Plotting Points aka Graphing Points. ( , ) x-value, y-value. + – . – +. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Section 2.1 Graphs](https://reader035.vdocuments.mx/reader035/viewer/2022062218/568161e3550346895dd1feaf/html5/thumbnails/1.jpg)
2.1 1
Section 2.1Graphs Points & Ordered Pairs (x,y) Quadrants I II III IV Solutions to Equations x-intercepts Nonlinear Equations
![Page 2: Section 2.1 Graphs](https://reader035.vdocuments.mx/reader035/viewer/2022062218/568161e3550346895dd1feaf/html5/thumbnails/2.jpg)
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Points and Ordered Pairs
![Page 3: Section 2.1 Graphs](https://reader035.vdocuments.mx/reader035/viewer/2022062218/568161e3550346895dd1feaf/html5/thumbnails/3.jpg)
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Plotting Points aka Graphing Points
( , ) x-value, y-value
– ++–
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Find the Coordinates of these PointsA: (-5,1)
B: (-3,2)
C: (0,4)
D: (3,3)
E: (1,0)
F: (0,-3)
G: (-5,-4)
![Page 5: Section 2.1 Graphs](https://reader035.vdocuments.mx/reader035/viewer/2022062218/568161e3550346895dd1feaf/html5/thumbnails/5.jpg)
2.1 5
Quadrants and Coordinate Signs
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Solutions to EquationsAny point on a graphed equation is a Solution
Why is (5,5) Why is (-3,3) Why is (-2,-1)a solution? a solution? a solution?
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How to Check if a Point is a Solution Is (2,-4) a solution of 4x – 3y = 22 ? Substitute 2 for x, and -4 for y 4x – 3y = 22
4(2) – 3(-4) 22 ? 8 + 12 22 ? 20 ≠ 22 No, not a solution
Is (-3,-5) a solution of y = 2x + 1 ? y = 2x + 1
-5 2(-3) + 1 ? -5 -6 + 1 ? -5 = -5 Yes, it’s a solution!
![Page 8: Section 2.1 Graphs](https://reader035.vdocuments.mx/reader035/viewer/2022062218/568161e3550346895dd1feaf/html5/thumbnails/8.jpg)
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Graph the equation y = x
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Graph the equation y = 2x
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Graph the equation y = -½x
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Graph the equation y = |x|
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Graph the equation y = x2 - 5
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2.1 13
Warm up that Ol’ Homework… Next time: Section 2.2 Functions