Graphing

DRY

the acronym for where the dependent variable goes on a graph

MIX

the acronym for where the independent variable goes on a graph

y-axis

dependent goes on the

x-axis

independent goes on the

line graphs

shows continuous data over periods of time; useful when change from point to point is of interest; data points are connected

scatter plots

used to show relationships between IV and DV; shows trends over time or rates; used when you want to predict an outcome; line of best fit; not connect the dot fashion

anomalous point

outlier is an ______

extrapolate

extend beyond the graph (or range of measured values), using the same slope

interpolate

predicting data between 2 measured points

linear line

straight line

directly proportional

a linear line going through the origin; rare; double x value and y value doubles

inversely proportional

y=1/x (curved negative down then straighten)

power

y=x^n (curved positive straight then up)

square root

y=√x (curved positive up then straighten)

when more then one line is on a graph

need a legend when _______

bar graphs

compare whole number outcomes of groups; not used for rate of change; bars represent categories

use bar graph

(Bar or line graph??) if IV column has only certain fixed values _______

use line graph

(Bar or line graph??) if Iv column has a continuous range of values ________

circle graphs

use when data is described as part of a whole; single point in time versus change over time; can display percent composition; add up to 100%