# Quadratic Functions: Question Preview (ID: 20961)

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**When does a quadratic function have 2 real solutions?**

a) When the discriminant is greater than 0

b) When the discriminant is less than 0

c) When the discriminant is equal to 0

d) Never

**When does a quadratic function have 1 real solution?**

a) When the discriminant is greater than 0

b) When the discriminant is less than 0

c) When the discriminant is equal to 0

d) Never

**When does a quadratic function have 0 real solutions (2 complex)?**

a) When the discriminant is greater than 0

b) When the discriminant is less than 0

c) When the discriminant is equal to 0

d) Never

**When does the graph of the quadratic open upwards?**

a) When a is positive

b) When a is negative

c) When a is zero

d) Never

**When does the graph of a quadratic open downwards?**

a) When a is positive

b) When a is negative

c) When a is zero

d) Never

**When does a quadratic function have a maximum?**

a) When the graph opens upwards

b) When the graph opens downwards

c) When a is positve

d) Never

**When does a quadratic function have a minimum?**

a) When a is positive

b) When a is negative

c) When the graph opens upwards

d) Both answers 1 and 3 are correct

**What is the equation of the axis of symmetry of a quadratic function?**

a) x = -b/2a

b) b^2-4ac

c) x = b/2a

d) x = -b/4a

**When can a set of data be modeled by a quadratic function?**

a) When the first differences are constant

b) When the second differences are constant

c) When the third differences are constant

d) When the fourth differences are constant

**What is the coordinate of the vertex of a quadratic function?**

a) (x, y)

b) (-b/2a, b/2a)

c) (-b/2a, f(-b/2a)

d) (-h,-k)

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