Take this Quiz: SAT Math — quadratic functions: reading a parabola without a picture | Zestly

Question 1

A quadratic function is defined as $f(x) = (x - 4)(x + 6)$. Where does the graph of this function cross the horizontal axis?

Accepted Answer

$4$ and $-6$

Answer

$4$ and $6$

Answer

$-4$ and $6$

Answer

$-4$ and $-6$

Question 2

For the function $f(x) = (x - 2)(x - 8)$, what is the horizontal coordinate of the turning point of the parabola?

Accepted Answer

$5$

Answer

$8$

Answer

$10$

Answer

$2$

Question 3

A quadratic function is given by $f(x) = 3(x - 1)^2 + 5$. What are the coordinates of the turning point of the parabola?

Accepted Answer

$(1, 5)$

Answer

$(1, -5)$

Answer

$(-1, 5)$

Answer

$(-1, -5)$

Question 4

Which function is equivalent to $f(x) = x^2 + 6x + 8$?

Answer

$(x + 6)^2 - 8$

Answer

$(x + 3)^2 + 8$

Answer

$(x + 6)^2 + 8$

Answer

$(x + 3)^2 - 1$

Question 5

Which function is equivalent to $f(x) = (x - 2)(x + 4)$?

Answer

$x^2 - 2x - 8$

Answer

$x^2 + 2x - 8$

Answer

$x^2 - 2x + 8$

Answer

$x^2 + 2x - 2$

Question 6

For the function $f(x) = 4x^2 - 8x + 3$, what does the constant term $3$ tell you about the graph?

Answer

Where the graph crosses the vertical axis

Answer

The value of the function at its turning point

Answer

The line about which the graph is symmetric

Answer

Where the graph crosses the horizontal axis