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Direct Variation
Partial Variation
Slope
First Differences
Communication
100
This is the general equation for direct variation
What is y=mx
100
This is the general equation for partial variation
What is y=mx+b
100
This is the equation for a slope in the for of words.
What is rise over run
100
This determines whether a function is linear when using this method.
What is constant first differences
100
rise over run, change in y over change in x, and rate of change represent what?
What is slope
200
Every direct variation passes through this point
What is the origin
200
The initial amount in a partial variation represents this variable in the equation of a line
What is b, or y-intercept
200
A vertical line has this type of slope
What is undefined
200
Negative first differences explain this
What is that the relation is negative (negative slope)
200
These three methods are used to determine whether a line is linear
What is graphing, writing an equation, first differences
300
The change in y over the change in x will find you this.
What is the constant of variation
300
TRUE or FALSE. The initial value can be negative
What is TRUE
300
In the equation y=6x+4 this is the slope
What is 6
300
TRUE or FALSE. Every time you find the first differences you are finding the slope
What is FALSE
300
The larger the value of the slope is the __________ the line
What is steeper
400
In the relationship, where the cost to repair your sink varies directly with the time it takes to fix, the independent variable is this.
What is time
400
This equation would represent the following: printing cards would initially cost $50 with a charge of $1 per card made
What is y=x+50
400
If a secretary can type 120 words per 60 seconds, the rate of change is this
What is 2 words/second
400
You can perform first differences when the table of values is set up in this way.
What is x's are evenly spaced and in sequential order
400
When using a table of values, you can find the y-intercept by first finding this.
What is finding where x=0
500
The cost of an apple varies directly with the number of apples bought. If it cost $5 for 20 apples, the constant of variation is this.
What is 0.25 or 1/4
500
In the equation C=-200n +2400, where C is cost and n is number of years, the slope illustrates this happening.
What is a decrease in value
500
If a line contains the co-ordinates (-2, 5) and (6, 3) this would be the slope.
What is -1/4
500
Which of the following is not linear: y=6x y=4 y=-3x+2 y=x²
What is y=x²
500
When given a graph with a line, you must first do this to calculate the slope.
What is find two points