## xFunctions Lesson Number 1 >> Start xFunctions ============================================================================== "Main Screen" Assignment Plot, sketch, and label the following equations: >> y = 3*x - 3 >> y = -2*x + (5/3) Label the graphs with the equation and the y-intercept as (0,b). Use the "New Expr." button. Type the equation at Let y = [ ] then "Done". Set x egual to 0 to fing the y-intercept. Do this at the "x = [ ] Set" input below the graph. Two different equations must be plotted using the "Main Screen" option since this option can only plot one equation at a time. ============================================================================== "Multigraph" Assignment / Click the "Main Screen" bar to change options. Plot, sketch, and label the following equations: >> No.1 y = x >> No.2 y = -2*x + 4 >> No.3 y = (-3/5)*x -4 >> No.4 y = 1 Label each line with the eqaution and the slope on the same coordinate plane. ============================================================================== "Animate" Assignment / Click the "Main Screen" bar to change options. Set "k st start" to -10 then "k at end" to 10. Set "Interval" to 20. >>Plot y = x - k then click "Go". What does the value of k do to the line when it goes through the animation sequence? Begin your sentence as follows: "When y = x - k is animated and the value of k changes from -10 to 10 ......" >>Plot y = k * x then click "Go". What does the value of k do to the line when it goes through the animation sequence? Begin your sentence as follows: "When y = k * x is animated and the value of k changes from -10 to 10 ......" ============================================================================== For fun play around with the "Graph 3D Utility" Try graphing z = x*x*y*y