Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors.
For a limited time, download free versions of the most popular TI software and handheld emulators.
Bring a new dimension of learning to your classroom with activities that put math in motion.
Explore teaching strategies to help students succeed on the SAT® and ACT® math tests using TI technology.
Drive deeper, more relevant understanding of science in middle grades and high school.
TI Connectivity CableUnit-to-Unit link cables
Students interpret the equation for a parabola in vertex form and gain a visual understanding of a parabola's focal width.
In the first problem, students are introduced to the terms focus and directrix. Through a graphing investigation, students will see that the distance from a point of the parabola to the focus is the same as the distance from the same point to the directrix.
In the second problem, students will use the Cabri™ Jr. app to reaffirm their conclusion from the first problem and then see how the shape of the parabola changes as the focus is moved closer and farther away from the vertex. Students will also determine an equation for the parabola through use of the measurement tool.
© Copyright 1995-2020 Texas Instruments Incorporated. All rights reserved.