- Thread starter AGlas9837
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If you're allowed, just graph in the usual way, like you've always done: Pick input values (y-values, in this case), plug them into the equation, solve for the output values (x-values, in this case), draw the dots, and sketch the graph. The only difference here is that you're working "sideways" from the "normal" parabola, but the steps are otherwise exactly the same. You should

Eliz.

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\(\displaystyle y = \sqrt{x+4}\) is the top "half" of the parabola (the positive side)AGlas9837 said:

\(\displaystyle y = -\sqrt{x+4}\) will give you the bottom half (the negative side)

in function mode, the calculator cannot graph both at the same time using only one function (the entire parabola is not a function, correct?) ... so, put the expression for the positive side in Y1 and the one for the negative side in Y2 ... the calculator graphs two distinct