Find where to buy the TI-84 Plus CE graphing calculator in a variety of bold, fun colors.
Download free 90-day trial 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 for synchronous and asynchronous learning with TI technology.
Drive deeper, more relevant understanding of science in middle grades and high school.
Texas Instruments
9-12
15 Minutes
In this activity, students will observe the slopes of the secant line and tangent line as point Q on the function approaches the other point P.
In this activity, students will explore graphically, numerically, and algebraically. First, students will graph the function y1(x) = x2 and the tangent to the function at x = 1.
Students will then graph the secant line and compare it to the tangent line as the slope decreases and the intersection points of the secant line and function curve get closer together.
Students will then calculate the average rate of change of y1(x) on an interval and use the slope of the secant line to estimate the instantaneous rate of change of y1(x) at a given x value.
TI websites use cookies to optimize site functionality and improve your experience. To find out more or to change your preferences, see our cookie policy page. Click Agree and Proceed to accept cookies and enter the site.
You can control your preferences for how we use cookies to collect and use information while you're on TI websites by adjusting the status of these categories.