Slope
What does the slope of a line tell you?
How steep the line is
What is the y-intercept?
The point where the line crosses the y-axis
What are the two axes on a graph called?
x-axis and y-axis
: If you earn $5 per hour, how would you write an equation to show your earnings (y) based on hours worked (x)?
y = 5x
What is a straight line called on a graph?
A linear function
If a line goes up from left to right, what kind of slope does it have?
Positive
In the equation y = 2x + 3, what is the y-intercept?
3
What is the point where the x-axis and y-axis meet called?
answer begins with letter O ( one word)
origin
If you start with $10 and save $2 each week, what is the y-intercept?
10
What does "x" usually represent in a linear function?
The input or independent variable
If a line goes down from left to right, what kind of slope does it have?
negative
If a line crosses the y-axis at the point (0, -1), what is the y-intercept?
-1
If you have the equation y = x, what does the graph look like?
A straight line going up from left to right through the origin
If a taxi charges $3 plus $2 per mile, what is the slope?
2/1
What does "y" usually represent in a linear function?
The output or dependent variable
What is the slope of a horizontal line?
0
What does the y-intercept represent in a real-world problem?
(Hint: starting or end point value or amount)
The starting value or initial amount
How many points do you need to draw a straight line?
two or more
If a plant grows 2 inches per week and starts at 4 inches, what is the equation?
y = 2x + 4
What is the general( slope intercept) form of a linear function
y = mx + b
What is the formula to calculate slope
hint: (_____ over ______)
rise over run
How do you find the y-intercept on a graph?
Look where the line crosses the y-axis
What is the first step in graphing a linear equation
Hint: find _________ intercept
Answer: Find the y-intercept
Sarah has $20 and spends $3 each day. Write an equation to represent her money (y) after x days.
y = -3x + 20
What is the name for the point where a line crosses the y-axis?
Y intercept