Data Type
How do we graph discrete data?
With a dotted line
Name one of the three ways we can tell if our relation has partial variation.
Table: has x = 0 and y = some number that's not 0
Graph: does not go through the origin
Equation: y = mx + b where b is not 0
What letter do we use for independent variables?
x
What direction does a positive slope go?
Up and to the right
How would you tell if a graph has a strong correlation?
How do we graph continuous data?
With a solid line.
Name one of the three ways we can tell if our relation has direct variation.
Table: has x = 0 and y = 0
Graph: goes through the origin
Equation: y = mx (b = 0)
You are doing chores to earn your allowance. For each chore you do, you earn $3.
What is the independent variable?
# chores
What direction does a negative slope go?
Down and to the right
How would you tell if a graph has a weak correlation?
All the points follow a general direction and are close-ish to our line of best fit
Is time an example of discrete or continuous data?
Continuous
Which graph is direct and which is partial (Ms. Dufault will pull up photo).
Green = partial
Blue = direct
You are buying boxes of cookies at a bakery. Each box of cookies costs $4.
What is the dependent variable?
Cost
What direction does a slope of 0 have?
How would you tell if a graph has no correlation?
Can't draw a line (no real relation because points all all over and a line wouldn't make sense!)
Is number of footballs discrete or continuous data?
Discrete
Which equation is direct and which is partial?
C = 4n + 0
E = 12h + 20
C = 4n + 0 is direct
E = 12h + 20 is partial
Which side of the table does the independent variable go on?
The left (98% of the time!)
What direction does an undefined slope have?
Straight up and down
What is extrapolating?
When you have to look beyond your data to get information
Continuous!
Which table is direct and which is partial (Ms. Dufault will pull up photo)?
Big Pine = partial
Hemlock = direct
What is dependent variable of c=40n+180?
c
What are all the different names we have for slope?
slope = m = (y2 - y1) / (x2 - x1) = rate of change = delta y / delta x = rise / run
If I am finding the temperature at following interpolating or extrapolating (Ms. Dufault will pull up a photo)?
Interpolation