GEN MATH REMEDIATION ACTIVITY #2: Evaluates a function
Quiz by JONALD ROSARIO
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- Q1
The function f(x) = 5x – 7 calculates the output by multiplying the input x by 5 and then subtracting 7. What is the value of f(5)?
19
24
18
12
120s - Q2
Given the function , which represents a quadratic expression, how would you find h(4)?
Substitute x = 4 and compute 42 + 4 x 4 - 3.
Substitute x = 4 and compute 42 - 4 x 4 + 3.
Substitute x = 4 and compute 42 + 4 x 4 +3.
Substitute x = 4 and compute -42 - 4 x 4 - 3.
120s - Q3120s
- Q4120s
- Q5
The function g(x) = x2 − 4x + 6 was evaluated as follows: For x = 3, the result is g(3) = 32 − 4(3) + 6 = 9 – 12 + 6 = 3. Identify if this evaluation is correct. If not, identify the error.
The error is in squaring the value of x.
The subtraction step is incorrect.
The evaluation missed adding 6 at the end.
The evaluation is correct.
120s - Q6
Given the function h(x) = 2x − 7, compare the function's output when x = 1 and when x = 2. How does the change in x affect the function's output?
The output increases as x becomes negative.
The output increases when x increases.
The output becomes zero when x is negative.
There is no significant change in the output.
120s - Q7
A student claims that the function f(x)=5x−2 evaluated at x=4 yields an output of 18. Evaluate this claim and provide a justification.
The claim is correct because the evaluation follows the correct steps.
The evaluation process is flawed and needs re-checking.
The claim is incorrect; the correct output should be 20.
The claim is incorrect; multiplication was done incorrectly.
120s - Q8
Two students, Alex and Sam, evaluated the function h(x) = 2x + 3 at x = 6. Alex's result was 15, while Sam's was 12. Evaluate both approaches and decide which, if any, is correct.
Neither approach was correct; both should be reviewed.
Both Alex and Sam made errors in evaluation.
Only Sam’s evaluation is correct; Alex added incorrectly.
Only Alex’s evaluation is correct; Sam made an arithmetic mistake.
120s - Q9
What is the domain of all polynomial functions?
All rational numbers
All positive real numbers
All negative real numbers
All real numbers
120s - Q10120s