This word is used to describe the slope of a linear function.
Constant
What is the definition of a function?
A relation where each input has one and only one output.
Evaluate y = 2x +1 when x = -3
y = -5
A table of values for a linear function is given. Fill in the missing value.
x -1 0 1
y 3 8 ?
y = 13
What is the slope of y=2x+4?
m=2
Based on the graph of function, What is y when x = 2?
y = 3
This word is used to describe the slope of a non-linear function.
Non-constant
Yes
Evaluate y= x2 + x + 1 when x = -5
y = 21
A table of values for a linear function is given. Fill in the missing value.
x -1 0 1
y 3 -2 ?
y = -7
What is the slope of y + 2x = 4?
m= -2
Must get in Slope-intercept form first.
y = -2x + 4
Based on the graph of function, what is y when x =-5?

y = 0
This word describes a relation that pairs each x value with only one y value.
A function
Is this a function and why?

No because x=8 has two outputs (3 and -3)
Evaluate y = x2 - 2 when x = -2
y = 2
A table of values for a linear function is given. Fill in the missing value.
x 2 3 5
y 2 1 ?
y = -1
What is the y intercept of y = -3x - 5?
b= -5
Based on the graph of the function, what is y when x = 4?

y = -2
What visual test can be used to determine if a graph is a function?
The Vertical Line Test
Does the following table represent a function?
x y
1 2
2 5
6 2
2 9
5 1
No, because the input (x) of 2 has two different outputs (y)
Evaluate y = 4x2 - 1 when x= -2
y = 15
A table of values for a linear function is given. Fill in the missing value.
x -21 0 21
y -4 -7 ?
y = -10
What is the slope of 4y - 2x = 8?
m= 1/2
Must get in Slope-intercept form first.
y = 1/2x + 2
Based on the function, what is y when x = -3?

y = -3
If you are asked for the rate of change of something, what should you calculate?
The slope
No, vertical lines are not functions.
If y = 8 what is x if y = 2x + 4
x = 2
A table of values for a linear function is given. Fill in the missing value.
x 3 7 10
y -23 -55 ?
y = -79
What is the slope of x = 2?
undefined
What does the slope of a distance vs. time graph represent?
The speed of the object.