How do I set domain and range in grapher.app?

Hey, I'm brand new to this program, and i can't figure out for the life of me how to set the domain and range of an equation.
For example, if i had the equation y=x^2 , how would i go about setting the x values>0?
Any quick replies are very appreciated! Its rather urgent.

Apple's Grapher does, in fact, have this capability. It's a shame that Apple's documentation is very poor. Grapher is a wonderful application. In any case, here is how to do it:
The general syntax is:
y = condition(s) ? expression
So for example, if you only wanted to graph the positive x values of x^2, you would enter:
y = x > 0 ? x^2
You can also have multiple conditions, separated with an ampersand (&). For example, the sinx graph from -pi to pi:
y = x > -π & x < π ? sinx
You can even limit the range. Example:
y = y < 5 ? x^2
This only shows the parabola up to the y = 5 line.
Again, you can mix and match any set of conditions you desire with the ampersand, including limits on the domain and range within the same set of conditions. Example of x^2 only showing positive x values up to the y = 5 line:
y = y < 5 & x > 0 ? x^2
Hope this helps.

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