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Learn how to find the slope and rate of change in linear equations. Understand different types of slopes and their characteristics. Practice examples and solve assignments.
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Finding Slope and Rate of Change Section 2.2 2.2: Slope and Rate of Change
Definitions • Linear equation: An equation whose graph is a line • Slope is a non-vertical line of the vertical change to the horizontal change between two points of a line • Y-intercept is where the line crosses the y-axis 2.2: Slope and Rate of Change
Slope Equation • Slope equation: • Rewrite it as: • Rise:The number of points up (vertically) from the previous point • Run: The number of points sideways (horizontally) from the rise 2.2: Slope and Rate of Change
Types of Slope Positive Slope Negative Slope 2.2: Slope and Rate of Change
Types of Slope Zero Slope Horizontal Line 2.2: Slope and Rate of Change
Types of Slope No Slope/ Undefined Vertical Line 2.2: Slope and Rate of Change
Zero versus Undefined 2.2: Slope and Rate of Change
Undefined Slope 2.2: Slope and Rate of Change
Steps • Find the change of Y and change of Xof two of the points • Determine the ratios for both • Simplify the ratio • Repeat the process for two other points • Check answer 2.2: Slope and Rate of Change
Example 1 What is the slope of these two points, (–1, 3) and (2, –2)? Will it rise, fall, horizontal, or vertical? Create a t-chart & solve for slope –1 – (2) = –3 3 – (–2) = 5 2.2: Slope and Rate of Change
Example 1 What is the slope of these two points, (–1, 3) and (2, –2)? Will it rise, fall, horizontal, or vertical? –2 3 –1 2 2.2: Slope and Rate of Change
+2 +2 +2 –1 –1 –1 Your Turn What is the slope of this table? Will it rise, fall, horizontal, or vertical? 2.2: Slope and Rate of Change
+1 +1 +1 +2 +4 +8 Example 2 What is the slope of this table? Will it rise, fall, horizontal, or vertical? 2.2: Slope and Rate of Change
Your Turn What is the slope of these two points, (1, –5) and (1, 0)? Will it rise, fall, horizontal, or vertical? 2.2: Slope and Rate of Change
Example 3 What is the slope of these two points, f(2) = 2 and f(6) = 8? Will it rise, fall, horizontal, or vertical? 2.2: Slope and Rate of Change
Example 4 What is the slope of these two points, f(a) = 3 and f(–2a) = 7? 2.2: Slope and Rate of Change
Your Turn What is the slope of these two points, f(2) = 8 and f(6) = 8? Will it rise, fall, horizontal, or vertical? 2.2: Slope and Rate of Change
Assignment Page 86 3-17 odd, 29-33 odd 2.2: Slope and Rate of Change