Finding X-Intercepts with the TI-84 Plus CE

This video tutorial provides tips and tricks for using a Texas Instruments graphing calculator to efficiently find the x-intercepts, also known as zeros or roots, of quadratic equations. It includes a detailed walkthrough of two examples, demonstrating how to set boundaries and make guesses to accurately locate the intercepts. The tutorial concludes with a reminder to download additional resources for further practice and preparation for exams.

What is the main purpose of the video tutorial?

• To demonstrate how to use a scientific calculator.

• To teach how to solve linear equations.

• To provide tips and tricks for using a graphing calculator.

• To explain the history of Texas Instruments.

Tags

CCSS.8.EE.C.7B

What are x-intercepts also known as?

• Zeros or roots

• Coefficients

• Asymptotes

• Vertices

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CCSS.HSF-IF.C.7C

Which key do you press to activate the blue commands on the calculator?

• 1st

• 2nd

• 3rd

• 4th

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CCSS.8.F.B.4

CCSS.HSF.IF.B.6

What is the left x-intercept for the equation y = x^2 - 2x - 8?

• -3

• -1

• -2

• 0

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CCSS.HSF-IF.C.7A

What boundaries are set to find the left x-intercept for y = x^2 - 2x - 8?

• -4 and -2

• -1 and 1

• -3 and -1

• -2 and 0

What is the right x-intercept for the equation y = x^2 - 2x - 8?

• 5

• 4

• 3

• 2

Tags

CCSS.HSF-IF.C.7A

What guess is made to find the second zero for y = x^2 - 2x - 8?

• 5

• 2

• 3

• 4

What is the root for the second quadratic equation example?

• 2.5

• 2.0

• 1.5

• 1.0

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CCSS.HSA-REI.B.4B

What should you do first when entering a new equation in the calculator?

• Press 2nd

• Press graph

• Press y=

• Press clear

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CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What additional resource is mentioned at the end of the video?

• A video tutorial

• A practice test

• A calculator manual

• A tips and tricks document