User
Course College Algebra
Test Week 2 Quiz 2
Started 1/19/22 8:24 PM
Submitted 1/19/22 9:03 PM
Status Completed
Attempt Score 100 out of 100 points
Time Elapsed 39 minutes
Results Submitted Answers, Correct Answers,
Displayed Feedback
Question 1
5 out of 5 points
Selected
Answer:
x=7
Correct
Answer:
x=7
Answer The "x" value of the vertex is equal to -b/2a.
Feedback:
f(x) = 1x^2-14x+44 where a=1, b= -14, c=44.
So x = -b/2a = -(-14)/2*1= 14/2 = 7.
Response The "x" value of the vertex is equal to -b/2a.
Feedback:
f(x) = 1x^2-14x+44 where a=1, b= -14, c=44.
So x = -b/2a = -(-14)/2*1= 14/2 = 7.
Question 2
5 out of 5 points
Using the same function as in #1, find the y value of the turning point.
Selected
Answer:
y = -5
Correct
Answer:
y = -5
Answer To find the y value, plug the "x" that you just found (or 7) into
Feedback:
the function, that is, f(7).
, f(7) = 7^2-14(7)+44 = 49-98+44 = -49+44 = -5.
Response To find the y value, plug the "x" that you just found (or 7) into
Feedback:
the function, that is, f(7).
f(7) = 7^2-14(7)+44 = 49-98+44 = -49+44 = -5.
Question 3
5 out of 5 points
Using the same function as #1, is the turning point you found a minimum
point or a maximum point?
Selected
Answer:
Minimum
Correct
Answer:
Minimum
Answer Look at the number in front of the x^2 term. If the number is
Feedback:
positive, then the vertex is a minimum point. If the number is
negative, then the vertex is a maximum point. Since the number
in front of the x^2 term is +1, then it is a minimum point.
Response Look at the number in front of the x^2 term. If the number is
Feedback:
positive, then the vertex is a minimum point. If the number is
negative, then the vertex is a maximum point. Since the number
in front of the x^2 term is +1, then it is a minimum point.
Question 4
5 out of 5 points
Using the same function as in #1, what is the function's y-intercept?
Selected
Answer:
(0, 44)
Correct
Answer:
(0, 44)
Answer There are 2 ways to find the y-intercept. Let x = 0 which means
Feedback:
find f(0) = 0^2-14(0)+44= 44 or look at the last number of the
function (the "c" value of the function) or +44. Since we want the
point, we need an ordered pair: (0,44).
Response There are 2 ways to find the y-intercept. Let x = 0 which means
Feedback:
find f(0) = 0^2-14(0)+44= 44 or look at the last number of the
function (the "c" value of the function) or +44. Since we want the
point, we need an ordered pair: (0,44).
Question 5
Course College Algebra
Test Week 2 Quiz 2
Started 1/19/22 8:24 PM
Submitted 1/19/22 9:03 PM
Status Completed
Attempt Score 100 out of 100 points
Time Elapsed 39 minutes
Results Submitted Answers, Correct Answers,
Displayed Feedback
Question 1
5 out of 5 points
Selected
Answer:
x=7
Correct
Answer:
x=7
Answer The "x" value of the vertex is equal to -b/2a.
Feedback:
f(x) = 1x^2-14x+44 where a=1, b= -14, c=44.
So x = -b/2a = -(-14)/2*1= 14/2 = 7.
Response The "x" value of the vertex is equal to -b/2a.
Feedback:
f(x) = 1x^2-14x+44 where a=1, b= -14, c=44.
So x = -b/2a = -(-14)/2*1= 14/2 = 7.
Question 2
5 out of 5 points
Using the same function as in #1, find the y value of the turning point.
Selected
Answer:
y = -5
Correct
Answer:
y = -5
Answer To find the y value, plug the "x" that you just found (or 7) into
Feedback:
the function, that is, f(7).
, f(7) = 7^2-14(7)+44 = 49-98+44 = -49+44 = -5.
Response To find the y value, plug the "x" that you just found (or 7) into
Feedback:
the function, that is, f(7).
f(7) = 7^2-14(7)+44 = 49-98+44 = -49+44 = -5.
Question 3
5 out of 5 points
Using the same function as #1, is the turning point you found a minimum
point or a maximum point?
Selected
Answer:
Minimum
Correct
Answer:
Minimum
Answer Look at the number in front of the x^2 term. If the number is
Feedback:
positive, then the vertex is a minimum point. If the number is
negative, then the vertex is a maximum point. Since the number
in front of the x^2 term is +1, then it is a minimum point.
Response Look at the number in front of the x^2 term. If the number is
Feedback:
positive, then the vertex is a minimum point. If the number is
negative, then the vertex is a maximum point. Since the number
in front of the x^2 term is +1, then it is a minimum point.
Question 4
5 out of 5 points
Using the same function as in #1, what is the function's y-intercept?
Selected
Answer:
(0, 44)
Correct
Answer:
(0, 44)
Answer There are 2 ways to find the y-intercept. Let x = 0 which means
Feedback:
find f(0) = 0^2-14(0)+44= 44 or look at the last number of the
function (the "c" value of the function) or +44. Since we want the
point, we need an ordered pair: (0,44).
Response There are 2 ways to find the y-intercept. Let x = 0 which means
Feedback:
find f(0) = 0^2-14(0)+44= 44 or look at the last number of the
function (the "c" value of the function) or +44. Since we want the
point, we need an ordered pair: (0,44).
Question 5
