smc-4443-10-Identify graphs

v1 Algebra, STD2 A4 2018 HSC 4 MC

Which graph best represents the equation \(y = 2-x^2\) ?

A.		B.
C.		D.

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\(D\)

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\(y = 2-x^2\)

\(y\text{-intercept}\ = -2\ \ \text{(when}\ x = 0)\)

\(\text{Quadratic is concave down (sad) with vertex at}\ (0,2). \)

\(\Rightarrow A\)

Which of the following could represent the graph of `y = -x^2 + 1`?

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`C`

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♦ Mean mark 53%.
COMMENT: A surprisingly low State mean mark!

`=> C`

Which graph best represents the equation `y = x^2-2`?

A.		B.
C.		D.

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`A`

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`y = x^2-2`

`ytext(-intercept) = -2\ \ \ (text(when) = 0)`

`text(Quadratic is positive with vertex at)\ \ y = -2`

`=>A`

The diagram shows the graph of an equation.

Which of the following equations does the graph best represent?

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`C`

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`text(Graph is a parabola that passes through)\ (0, 1).`

`=> C`