Algebra Word Problems Flashcards
Is, will be, yields
=
What number, how much
“N” or any variable
Opposite of x
-x
Ratio of x to y
X/y
A number n less 2
N-2
A number n less than 2
2- n
A number reduced by 2
n-2
Of
Times
The _ is the average
To find:
Mean
Add all outcomes and divide by total number of outcomes
The number in the middle when the data set is arranged in order from least to greatest
Median
MOST frequent outcome in data set
*Most common, can be more than one
Mode
Difference btwn highest and lowest number in the data set
Range
Data points much different than other data points
Raise the value of the mean
Can skew the data
Outliers
If distribution is skewed left (outliers are smaller numbers) the _ will be less than the median and the _ is the best indicator
Mean is less
Media is the best indicator
If distribution is skewed right (outliers are large numbers) the _ will be greater than the median and the _ is the best indicator
Mean will be greater
Median best indicator
Mean is pulled toward longer “tails” of the data
The set includes extreme values that are to the right or high. Median is unaffected but mean would be greater
Show data using the median, range and outliers
Helpful to show how data is distributed
Box plots or box and whisker plots
Bar graph showing continuous data over time
Display frequency of data using dots and can be used to observe distribution of data in a set
Histogram
Dot plots
Use points to show relationships btwn two variables
One variable is on the x axis and the other on th y axis
Scatter plot
Show changes in data by commenting the points on a scatter plot using a line
Ex: measure time, temperature changes over a day, school attendance
Line graphs
Show parts of a whole. Each slice represents a percentage of a whole
Circle graph or pie chart
The likelihood that something will happen
Expressed as a fraction
Probability
Probability always btwn
No chance of something occurring:
100% chance of something occurring:
0 and 1
Probability is 0
Probability is 1
