Equation Checks
for Multiple Choice Questions
The graphing calculator allows for
several methods of checking or comparing multiple choice answers.
Let's look at the checking of algebraic problems by forming equations.
Process:
- Choose your "favorite" positive
one-digit (for ease) integer value and store the
value in x (do not pick 0 or 1).
To store a 7: 7
sto x (the sto command is above the
 key)
- Hit ENTER.
- Enter the algebraic expression
from
the problem on the calculator screen using x as your
variable.
- Set this expression "=" to the
each of the multiple choice answers.
The "=" sign is the  key.
- Hit ENTER.
- If a false appears, this is NOT the correct answer.
If a true appears, this IS
the correct answer.
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1. The expression (x - 6)2 is equivalent to
(1) x2 - 36
(2) x2 + 36
(3) x2 -
12x + 36
(4) x2 + 12x + 36
The "favorite" number used here was 7. When you hit ENTER and "true" appears, you have found the
answer (you found the equivalent answer).
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2.
Which of the following statements is true?
(1)
(2) 
(3) 
(4) 
Use parentheses where needed. Remember to use the "negative symbol" and not the "subtraction" symbol for the negative exponents. |
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3. When
12x3 + 4x is divided by 4x,
the answer is
(1) 3x2 + 1
(2) 3x + 1
(3) 3x2 + x
(4) 3x2
When the given information is set up as a fraction, it is easy to see which choice will be the correct answer.
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