2Using the TI-Calculator Solve for y, then press ‘y=‘ key. Enter the equation.Press ‘Graph’ key (if can’t see graph, try hitting ‘Zoom’ and ‘Standard’)The answer(s):Where does the graph hit the x-axis?Hit 2nd-Trace, then 2-ZeroThe screen asks ‘Left bound?’. Use arrow keys to move the cursor to the left of one of the x-intercepts. Press ‘Enter’.The screen asks ‘Right bound?’. Use arrow keys to move the cursor to the right of that x-intercept. Press ‘Enter’. Then press ‘Enter’ again to ‘Guess’ the zero.Repeat this process to find the other zero.
3****You can have 2, 1, or 0 answers!**** Vertex: minimum/maximum point of the graphPress 2nd-Trace, then 3-(Minimum) for upward opening, 4-(maximum) for downward openingAgain, follow previous slide’s directions for answering left bound and right bound questions.Axis of Symmetry: Cuts Parabola in half“x = “ x-value from vertex
4Example: Parts to Know **Solutions, Zeros, Roots, and X-intercept all Solution: x= -2, x = 1Vertex: (- 0.5, 2.25)Axis of symmetry: x = - 0.5**Solutions, Zeros, Roots, and X-intercept allmean the same thing, find the value(s) of x!**
5YOU TRY! Example:Parts to KnowRoots:Vertex:Axis of symmetry:
6Example: Parts to Know Roots: x= -3 Vertex: (- 3, 0) Axis of symmetry: x = - 3