MAT129 Fall 2025 Notes
mathnstuff.com/math/precalc/MAT129fa25/p.11.5.htm
© 2025   A2, Agnes Azzolino
Q4 -Logarithmic Properties; Solving Logarithmic and
Exponential equations, 6.1 - 6.7 , PG. 516, 526

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Due: Monday night at 11:59 PM.
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Welcome to Prealc!
Growth Quiz.
Hi,
    You should have been reading the book and doing the odd problems. This is an even problem similar to the odd problems with answers in the back of the book.
    Your quiz is one problem from page 557, problem 22. It states:
"For the following exercises,
Find the formula for an exponential function that passes through the two points given. (3,1) and (5,4)"
Then, find the y-value when x=9, that is find f(9), complete: (9, f(9) ).
    My version is shown below and below that is where to find the material in the book, including, directions/instructions for checking the work with a calculator.
    You must show work.
    As usual, no AI or human help is permitted.
    As usual write your title, ###.first.last.Q3, on each page, name your file and attach it to the email to precalc@mathnstuff.com.
    Quiz 3 is due Sunday night, 10/12/25 at midnight.
    Happy day off on Monday!
    Contact me through the pink box on www.mathnstuff.com/math/math.htm
or with the phone number on your class CANVAS home page.
    Stay safe, A2 

pg 554: The Continuous Growth/Decay Formula
page 545 6 • Exponential and Logarithmic Functions
	"Defining Exponential Growth"

On a calculator: "pg. 551, "HOW TO
"Given two points on the curve of an exponential function, 
	use a graphing calculator to find the equation.
"1. Press [STAT].
"2. Clear any existing entries in columns L1 or L2.
"3. In L1, enter the x-coordinates given.
"4. In L2, enter the corresponding y-coordinates.
"5. Press [STAT] again. Cursor right to CALC, scroll down 
	to ExpReg (Exponential Regression), and press [ENTER].
"6. The screen displays the values of a and b in the exponential equation."
Your OpenStax "E-book: Algebra and Trigonometry" is founnd at https://openstax.org/details/books/algebra-and-trigonometry