Quadratic functions and their graphs Quiz

1. What is the $y$-intercept of $y=x^2+3x-4$?

• A. $-4$
• B. $4$
• C. $3$
• D. $-3$

2. What are the roots of $y=x^2-7x+12$?

• A. $x=-3$ and $x=-4$
• B. $x=3$ and $x=4$
• C. $x=7$ and $x=12$
• D. $x=-7$ and $x=12$

3. A parabola has roots $x=2$ and $x=8$. Find its axis of symmetry.

• A. $x=10$
• B. $x=6$
• C. $x=5$
• D. $x=4$

4. Find the vertex of $y=x^2-6x+5$.

• A. $(3,4)$
• B. $(-3,-4)$
• C. $(6,5)$
• D. $(3,-4)$

5. Which statement is true for $y=-x^2+4$?

• A. It has a maximum at $(0,4)$.
• B. It has a minimum at $(0,4)$.
• C. It has no $y$-intercept.
• D. It has a maximum at $(4,0)$.