Functions
In function notation f(x), which variable is the input?
x
In y = mx + b, which letter represents the slope?
m
Rewrite 3 × 3 × 3 × 3 using an exponent.
34
x2 - x - 12
(x - 4)(x + 3)
What is the graph of a quadratic function called?
A parabola
In a graph, how would you represent greater than or equal to, as opposed to just greater than?
Solid line instead of a dotted line
What is the range of {(1, 2), (3, 4), (5, 2)}?
{2, 4}
In y = -4x + 7, what is the y-intercept?
7
Write x4 · x3 as a single power.
x7
x2 + 8x + 7
(x + 1)(x + 7)
What is the highest exponent in a quadratic function?
2
What is |-8|?
8
If f(x) = 2x + 1, what is f(3)?
7
What is the slope of a line perpendicular to y = -3/2x + 10?
2/3
Write (x4)5 as a single power.
x20
x2 - 49
(x + 7)(x - 7)
Does y = -x2 + 4 open upward or downward?
Downward
When you multiply an inequality by a negative number, what happens to the inequality sign?
It reverses
Algebra: Is this a function: {(1, 2), (2, 3), (2, 4)}
No
What is the form y - y₁ = m(x - x₁) called?
Point-slope form
Is √2 rational or irrational?
Irrational
x2 + 2x - 35
(x + 7)(x - 5)
What is the axis of symmetry of y = (x - 3)2 + 1?
x = 3
How many solutions does |x| = 5 have?
2
Algebra: What's the domain of x = 3?
Algebra: 3
The equations y = 2x + 1 and 3y = 6x + 3 describe what relationship?
The same line
What exponent is equivalent to taking a square root?
1/2
3x2 - 7x - 20
(3x + 5)(x - 4)
What is the vertex of y = (x + 2)2 - 5?
(-2, -5)
What two numbers solve |x - 3| = 4?
7 and -1