Understanding Piecewise Functions

This video tutorial explains how to determine the function rules for a piecewise defined function using a graph. It covers the analysis of three segments: blue, green, and yellow. For each segment, the video demonstrates how to find the slope and y-intercept to establish the function rule. Additionally, it introduces an alternative method using endpoints to derive these rules. The tutorial aims to enhance understanding of piecewise functions and their graphical representation.

What is the primary reason for having multiple function rules in a piecewise function?

• To avoid using graphs

• To simplify calculations

• To match different segments of the graph

• To make the function more complex

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CCSS.8.EE.B.5

How is the slope of the blue segment determined?

• By guessing

• Using the midpoint formula

• By calculating the change in y over the change in x

• By measuring the angle with the x-axis

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What is the function rule for the blue segment?

• f(x) = x + 1

• f(x) = -x + 1

• f(x) = -2x + 1

• f(x) = 2x + 1

What type of function is represented by the green segment?

• Linear function

• Exponential function

• Quadratic function

• Constant function

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CCSS.HSF.IF.B.5

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What is the domain of the green segment?

• x >= 1 and x < 4

• x > -4 and x <= -2

• x >= -2 and x < 1

• x > -2 and x <= 1

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CCSS.8.EE.B.5

How is the slope of the yellow segment calculated?

• By using the derivative

• By using the slope formula with two points

• By using the quadratic formula

• By using the distance formula

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What is the function rule for the yellow segment?

• f(x) = 2x + 1

• f(x) = -2x + 1

• f(x) = -x + 1

• f(x) = x + 1

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CCSS.HSF.IF.B.5

CCSS.8.F.A.1

What is the domain of the yellow segment?

• x > 1 and x <= 4

• x >= 1 and x < 4

• x > -4 and x <= -2

• x >= -2 and x < 1

What is an alternative method to determine the function rules for segments?

• Using the derivative of the function

• Using the area under the curve

• Using the endpoints and slope formula

• Using the midpoint of the segment

What is the benefit of using endpoints to determine function rules?

• It provides an exact solution without any graph

• It avoids using any calculations

• It makes the function more complex

• It simplifies the process when the graph is unclear