Creating and Graphing Exponential Equations Part 2 ~Adapted
from Walch Education
Slide 3
Graphing Exponential Equations Using a Table of Values:
1.Create a table of values by choosing x-values and substituting
them in and solving for y. 2.Determine the labels by reading the
context. The x-axis will most likely be time and the y-axis will be
the units of the final value. 3.Determine the scales. The scale on
the y-axis will need to be large since the values will grow or
decline quickly. The value on the x-axis needs to be large enough
to show the growth rate or the decay rate.
Slide 4
Practice # 1 The bacteria Streptococcus lactis doubles every 26
minutes in milk. If a container of milk contains 4 bacteria, write
an equation that models this scenario and then graph the
equation.
Slide 5
Initial bacteria count = 4 Base = 2 Time period = 26 minutes
Since the base is repeating in units other than 1, use the equation
where t = 26. Using Substitution: Identify the known
quantities:
Slide 6
Lets Create a Table of Values xy 04 268 5216 7832 10464
Slide 7
Setup the coordinate plane
Slide 8
Plot the points on the coordinate plane and connect the points
with a curve.
Slide 9
An investment of $500 is compounded monthly at a rate of 3%.
What is the equation that models this situation? Graph the
equation. Try to solve this one: