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## Ignore words

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(-x,y)

(x,y) reflects across the y-axis

(x,-y)

(x,y) reflects across the x-axis

(-x,-y)

(x,y) reflects across the origin

(y,x)

(x,y) reflects across the line y=x

(-y,-x)

(x,y) reflects across the line y=-x

y=f(x+a), a>0

y=f(x) moves a units left

y=f(x-a), a>0

y=f(x) moves a units right

y=f(x)+a, a>0

y=f(x) moves a units up

y=f(x)-a, a>0

y=f(x) moves a units down

y=-f(x)

y=f(x) reflects across the x-axis

y=f(-x)

y=f(x) reflects across the y-axis

y=-f(-x)

y=f(x) reflects across the origin

f(-x)=f(x)

the function is an even function and has symmetry across the y-axis

f(-x)=-f(x)

the function is an odd function and has symmetry across the origin

0</=a<1

y=f(x) widens

y=af(x), a>1

y=f(x) narrows

Histogram

A bar graph depicting a frequency distribution. The height of the bars indicates the frequency of a group of scores.

Bar graph

Bars do not touch; categorical data is typically on the horizontal axis; to describe: comment on which occurred the most often or least often

line graph

shows change over time

Scatter plot

is a graph used to determine whether there is a relationship between paired data. Scatter plots can show trends in data.

outlier

a data value that is either much greater or much less than the median

box and whisker (box plot)

a diagram or graph using a number line to show the distribution of a set of data; displays the median, upper and lower quartiles, and the maximum and minimum values of the data

pie graph or circle graph

a graph using a divided circle where each section represents part of the total

Stem-and-leaf plot

it displays individual observations

pictograph

show data in multiples of a number

Mean

the sum of all the values divided by the number of values

Median

A segment or Ray that joins a vertex to the midpoint of the opposite side

Mode

the most common value

line of best fit

The line that most closely follows a trend in data is called the best-fitting line.