To graph a function, for example, y = f(x) = 3x2 + 2x + 1 with the graphing calculator or with the function grapher, type in 3x^2+2x+1
To graph y = f(x) = 3x2 + 2x + 1 for -4 < x < 3 type in 3x^2+2x+1 domain=(-4, 3)
To graph y = f(x) = 3x2 + 2x + 1 for x < 3 type in 3x^2+2x+1 domain=(-infinity, 3)
You can also use the key combination Ctrl+8 or Alt+8 for ∞ .
If you don't specify a domain (interval), the graphing calculator appends (-∞, ∞) to the function expression after pressing Draw Graph or Enter. It can then conveniently be modified if needed.
To graph a function using the polar coordinate system, for example, r = f(θ) = sin(2θ), with the polar graphing calculator or with the polar function grapher type in sin(2θ)
To graph r = f(θ) = sin(2θ) for -π/2 < θ < 3π/2 ) type in sin(2θ) domain=(-pi/2, 3pi/2)
To type in θ use the key combination Ctrl+T or Alt+T. You can also use x instead of θ; they will be replaced by θ when you press Draw Graph or Enter on the keyboard.
If you don't specify a domain interval, the graphing calculator or the function grapher append (0, 2π) to the function expression after pressing Draw Graph or Enter. It can then conveniently be modified if needed.
You can also use the key combination Ctrl+P or Alt+P for π.
Note: You can use any numeric (constant) expression such as 1.5+2e+log(10)/2 for domain (interval) end-points. You can also evaluate a function at any numeric (constant) expression by typing it in the text-box provided.
Warning: When graphing functions in polar coordinate system or when graphing parametric curves do not use very large domain intervals as this might prolong the graphing time. Also, in these cases, do not use infinity as a domain end-point. If you do, it will be replaced by some finite values.
When you use the Animate options (other than none), the graph(s) are drawn slowly according to the graphing speed you have selected. It helps to visualize where the graph(s) start and trace when graphing in polar coordinate system or graphing parametric curves. In general, you use slower speeds when the graph has large loops or many loops. This option does not work on some Mac operating systems and with such systems you are better off if you select none to save graphing time.
The gCalcD function grapher is the most accurate and the only known function grapher that can identify holes in the graphs of functions, and also draw asymptotes separately from the graphs with dashed lines and cross out those portions of the domain interval where the function is not defined.
In addition, the gCalcD function grapher is the only function grapher that completely and accurately produces the graph of functions such as f(x) = x2/3 (enter x^(2/3) ).
To graph equations of the form g(x,y) = f(x,y) go to Equation Grapher