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## Linear Equations and Graphing• Linear Equations in two variables • Graphing Ax+By = C • Slope of a line • Special Forms of a linear equation • More applications The Price-demand equation again: d = 1720 − .50p. We can
Ax+By = C where A, B, and C are constants (A and B not both zero)
and Circle the LINEAR equations:
This theorem makes it very easy to graph a linear
equation... Moral: Theorems are your friends. Two special cases: • Horizontal lines y = c for some number c • Vertical lines x = c for some number c Try graphing 4x − 3y = 12 by finding two easy solutions to
the What about x = 3?
What do the coordinates of an x-intercept look like? What do the coordinates of a y-intercept look like? The intercepts of a linear equation are easier to locate
than the
Find the x- and y- intercepts for 4x − 3y = 12. Find the x- and y-intercepts for 7x − .2y = 12.
What are the p- and d-intercepts? What do they mean here? |