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**5.7.1 Ax + By = C Form (standard form)**

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**Remember slope intercept form?**

y = mx + b This equation gives a lot of information about slope and intercept Good for some real life applications Integers { , -2, -1, 0, 1, 2, }

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**Standard Form Ax + By = C where A, B, and C are integers**

Where (0, ) y-intercept And Where ( , 0) x-intercept y-intercept X-intercept

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**Similarities Both are great for graphing equations of a line.**

Graph y=mx +b using slope and y-intercept Graph Ax + By = C using two intercept method.

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Differences y=mx +b gives slope information which is nice for many applications we have seen, usually when time is a variable Ax + By = C gives two intercepts which is useful for other types of applications, usually when time is not a variable (maximization problems)

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Finding the slope For Ax + By = C The slope is:

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**Graphing (problems 1-11, 15-22)**

Ex) x + y = 2 A = 1 B = 1 C = 2 x intercept ( , 0) (2, 0) y intercept ( 0, ) (0, 2)

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**Point Slope form (problems 24 – 31)**

Given a point and the slope: m = 6; (3, 4) Use the point slope form of the equation: y – 4 = 6(x – 3) y – 4 = 6x – 18 y – 6x = -14

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Homework p , 5 – 13 odd, 21 – 27 odd, 33, 35

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Section 1.8 Homework questions?. Section Concepts 1.8 Linear Equations in Two Variables Slide 2 Copyright (c) The McGraw-Hill Companies, Inc. Permission.

Section 1.8 Homework questions?. Section Concepts 1.8 Linear Equations in Two Variables Slide 2 Copyright (c) The McGraw-Hill Companies, Inc. Permission.

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