SOLUTION: find the vertex of the following equation and state whether it opens up, down, left or right: y=x^2-4 Please help me with this! Thank you

Question 875383: find the vertex of the following equation and state whether it opens up, down, left or right:
y=x^2-4
Please help me with this! Thank you
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Opens up or down? What is the coefficient on the x^2 term?

For vertex, what if the full version of standard form were used? You need to know how to read from it:
;
Can you read the vertex now? When you have , the vertex is (0,0). What was changed?

-
y is a function in terms of x.
and , so opens upward.
Vertex is (0,-4).
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