Finding Slope and Rate of Change Section 2.2 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
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 12/9/2018 12:57 AM
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 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Types of Slope Positive Slope Negative Slope 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Types of Slope Zero Slope Horizontal Line 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Types of Slope No Slope/ Undefined Vertical Line 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Zero versus Undefined 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Undefined Slope 2.2: Slope and Rate of Change 12/9/2018 12:57 AM 8
2.2: Slope and Rate of Change Steps Find the change of Y and change of X of 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 12/9/2018 12:57 AM
Create a t-chart & solve for slope 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 x y –1 3 2 –2 –1 – (2) = –3 3 – (–2) = 5 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
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 2 –1 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Your Turn What is the slope of this table? Will it rise, fall, horizontal, or vertical? +2 –1 +2 –1 +2 –1 x –2 2 4 f(x) 1 –1 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Example 2 What is the slope of this table? Will it rise, fall, horizontal, or vertical? +1 +2 +1 +4 +1 +8 x 2 3 4 5 f(x) 8 16 2.2: Slope and Rate of Change 12/9/2018 12:57 AM
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 12/9/2018 12:57 AM
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 12/9/2018 12:57 AM
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 12/9/2018 12:57 AM
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 12/9/2018 12:57 AM
2.2: Slope and Rate of Change Assignment Page 86 3-17 odd, 29-33 odd 2.2: Slope and Rate of Change 12/9/2018 12:57 AM