How do you graph y=x2+3?

1 Answer
Jul 28, 2016

See the explanation

Explanation:

Suppose there was an unknown value z

Then (z)2=z2 and (+z)2=z2

So z2=±z
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So in reality we have y=±x2+3

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Lets consider the relationship a different way. The above is such that x is the independent variable and y the dependant variable. Suppose we reversed this.

Write as x2=y3

Squaring both sides

x2=y26y+9

x=y26y+11

If you plotted this then you would have the same graph as
y=±x2+3

Tony B

Tony B