• When you first arrive in class:
– If you have any questions about the homework
please put the question #’s on the board
• If someone has already put your question # up, and
you’d like to see an explanation, please put a check
mark next to the problem
• The idea being that problems that lots of people are
finding difficult will be clearly marked
• We’ll start with ≤ 10 minutes of Q+A
Math 110: Precalc 1
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Math 110:
Pre-Calculus 1
Instructor: Mike Panitz
(mpanitz@cascadia.ctc.edu)
Exam #1
• This will be on Wednesday, April 18th
– NEXT LECTURE
• Exam will take 1 – 1.5 hours
– You will have the entire class period for the
exam
– You’re welcome to take more time, but we’ll
have to move to a different room @ 3:20pm
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Exam #1
• Grading will be more detail-oriented than
on the homeworks
• There will be multiple versions, with each
one given a distinct color
– You will not be allowed to sit next to someone
with the same exam
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Exam #1
• Probably about 10 questions, ~10 points/question
– For all questions, ONE POINT for the correct answer
– Remainder for SHOWING YOUR WORK and for
CHECKING YOUR WORK
• Checking (where possible) will be required, and worth points
• I’ll try to make it clear on the exam which questions you
HAVE to check your work on
• You will need to write out any formulas, before
you use them.
• Keep everything in fraction form!
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Calculators on Exams
• You’re allowed/encouraged to use your
graphing calculators on the exams
– I may have ‘loaner’ calculators, I might not
• ALL MEMORY WILL BE CLEARED!!
– So any programs that you’ve loaded into it will
be removed.
– This will be done immediately before each
exam
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Exam #1:Study Tips
• Go through, and make sure you can answer, step by step,
and explain, every question from the In-Class Exercises,
homeworks, and book examples on the topics
• Make sure that every you can fully answer every single
TYPE of question
– Not just ‘equations with radicals’, but
– Equations with 1 radical (
– Equations w/ 2 radicals (
– Etc.
x  1  10 )
2x  3  x 1  1 )
Math 110: Precalc 1
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Homework Feedback: Lecture #3
• ‘Solve by Factoring’
–
2
3
x
 5x  2  0
Common mistake:
3x  2x  1
– Should keep the = 0, and show how to finish this
problem: 3x 2  5 x  2  0
3x  2x  1  0
3x  2  0 AND x  1  0
3x  2 AND x  1
2
x
AND x  1
3
Math 110: Precalc 1
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Homework Feedback: Lecture #4
• Equations with radicals in them:
– VERIFYING (‘checking your work’) is REQUIRED
• This is how you know that #28 has no solution
– Not including this step means that you haven’t finished
the problem
– Make sure you can solve radical equations that have
TWO radicals in them
• Quadratic Formula:
– You need to first calculate the discriminant, and only
then, go on to figuring out the answer
Math 110: Precalc 1
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General Homework Feedback
• Keep everything in fraction form!
• Show all your work!
Math 110: Precalc 1
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• Today’s Topics
– Q+A
– Graphing a quadratic equation (a parabola) by
hand
– ‘Maximizing Revenue’ applied problem
– Finding the line of best fit (with a TI-83)
• Quadratic regressions
• The linear/quadratic regressions will be on the exam
– General Exam Q + A
• (time permitting)
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• Reading review for this class:
– § 3.1 – Quadratic Function & Models
– Exam Review
• Reading for next class:
– Everything up to, and including, today’s material
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