
Researchers use graphs in virtually every area of science and math.
We can often gain more insight by studying the graph of an event
than by studying the event itself. Solutions to questions that become
lost in volumes of data can become quite clear when the data are
plotted on a graph.
For example, in driver’s education, you learn
about the appropriate "safe" distance you need to stay
behind other vehicles so there is enough time to stop. Below is
a chart that displays your speed, thinking distance (how far the
car travels from the time you decide to brake until you actually
brake), braking distance (how far the car travels until it stops)
and the total stopping distance.
I think you will agree that it is much easier to see and interpret
the data in the graph than in the chart.
Upon
completion of the activities in this unit, you should be able
to:
 Use the following
terms in a written paragraph to describe the key concepts of this
unit.
 coordinate plane
 domain
 function
 graph
 inverse of a relation
 linear equation
 mapping
 ordered pair
 origin
 quadrant
 range
 relation
 xaxis
 yaxis
 xcoordinate
 ycoordinate
 Graph
ordered pairs on a coordinate plane.
 Identify
the domain, range, and inverse of a relation.
 Solve
linear equations for a variable and a domain.
 Graph
linear equations on a coordinate plane.
 Determine
if a relation is a function.
 Calculate
values for a function.
 Graph
inequalities on a coordinate plane.
 Write an equation
to represent a relation given a chart of values.
