3- Linear Functions Flashcards
1
Q
What is a graph?
A
A picture of a solution set
2
Q
How do you find x- & y-intercepts?
A
Plug in zero for the other variable
3
Q
How do you find the slope of a line if given a graph?
A
rise over run
4
Q
In what case would you use y2 -y1 divided by x2 - x1 ?
A
If given 2 ordered pairs
5
Q
How would you find the slope of a line using the standard form linear equation?
A
Opposite A over B
6
Q
What is slope-intercept form?
A
y = mx + b
- m is the slope - b is the y-intercept
7
Q
What are the 4 main types of slope?
A
- Postive (line going up to the right)
- Negative (line going down into the left)
- Horizontal (m=0)
- Vertical (m= No Slope or Undefined, vertical line is not a function)
8
Q
How do you write a linear function?
A
f(x) = mx + b
-y is same as f(x)
9
Q
What are the “zeroes” of a function? How do you find them?
A
- Any x-values that go in & make y zero
- Plug in 0 for f(x)
10
Q
Define reciprocal
A
2 numbers whose product is 1
-Example: 1/2 & 2
11
Q
What is standard form?
A
Ax + Bx = C
- A & B represent coefficients - They cannot be 0
