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Explore rectangular coordinates, the Cartesian plane, midpoint formula, equations, and more to deepen your understanding of functions and graphs. Learn how to find distances, midpoints, and intercepts for equations. Practice plotting graphs and solving equations with ease.
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Chapter 1: Functions and their Graphs 1.1 Rectangular Coordinates and 1.2 Graphs of Equations
You know what this is already… 1.1 Rectangular Coordinates I. The Cartesian Plane
Show that the points (1, -3), (3, 2), and (-2, 4) form an isosceles triangle.
The midpoint between two generic points can be found by taking the average of the x-coordinates and the average of the y-coordinates… • Find the midpoint of the line segment joining the points (-9, 5) and (4, 2) III. The Midpoint Formula
“A solution of an equation in two variables (x and y) is an ordered pair (call it (a, b) ) such that when x is replaced with a and y replaced by b, the resulting equation is a true statement….” • WHAT? Basically, if the point fits into the equation, then that point should be included in the graph of the equation. • The actual graph is the set of ALL points that work. 1.2 Graphs of EquationsI. The Graph of an Equation
Sketch the graph of the following: • y= 2x+1 WHEN IN DOUBT PLOT (KINDA) RANDOM POINTS
X- Intercept Y-intercept How do you find them? II. Intercepts of a Graph
A circle with a center (h, k) and a radius r consists of all points (x, y) equidistant from the center. We can find the equation of a circle from what we know of the distance formula… • Find the standard form of the equation of a circle with center at (2, -5) and a radius of 4. IV. Circles