Transcript 4.4 Graphing a Function Rule

4.4 Graphing a
Function Rule
{
I can graph equations that represent functions.
Graphing a Function Rule
A graph is the set of all solutions to an
equation.
 When a graph shows a real-world
relationship, it only shows points that
make sense for the given situation

How to Graph
Create a table of values
 Plot the ordered pairs
 Connect the points with a line to show
ALL solutions


Ex: graph the function rule y = -2x + 1
Real-World Functions
Choose appropriate intervals for the
units on the axes.
 If all data are nonnegative, show only
the first quadrant.
 Plot only points that make sense in
context.

You try!


Graph the equation by creating a table of
values:
y=
1
𝑥
2
−1
Practice


Megan buys eggs at the supermarket for
$1.75 per carton. The cost is a function of
the number of cartons bought. What is
the graph of the function?
Graph
Continuous vs. Discrete

A continuous graph is a graph that is
unbroken

A discrete graph is composed of distinct,
isolated points.
Identifying

The function rule W = 8g + 700
represents the total weight W, in
pounds, of a spa that contains g gallons
of water. Its capacity is 250 gallons. What
is a reasonable graph?

Is this continuous or discrete?
Assignment
ODDS ONLY
 P. 257 #9-31
