Arithmetic Sequences and Explicit Formulas

Quiz
•
Mathematics
•
9th Grade
•
Medium
Standards-aligned
Rachel M K
Used 3+ times
FREE Resource
19 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
FYI, The picture is an example of the **explicit formula**
What does the -3 represent?
The constant rate of change
The y-intercept
An x-value
Tags
CCSS.HSF.BF.A.2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the 10 represent?
The constant rate of change
When the nth term is zero (the zero term)
An x-value
Tags
CCSS.HSF.BF.A.2
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
What is: A list of numbers that increase or decrease by a constant rate
Geometric sequence
positive sequence
negative sequence
Arithmetic sequences
Tags
CCSS.HSF.BF.A.2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Is this an arithmetic sequence?
Maybe
Yes
No
Answer explanation
The rate is not constant, which is required in arithmetic sequences.
So no, its not arithmetic
Tags
CCSS.HSF.BF.A.2
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What two things do you need to write the explicit formula? (Choose two and look carefully)
the last term
The zero term (when x=0)
Constant rate
changing rate
Answer explanation
You need to find the rate of how the y's change, and then find the f(x) value when x is zero.
Tags
CCSS.HSF.BF.A.2
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
**This question requires some thinking**
If the first term (when n=1) of a sequence is 7 and the common difference is 6, what is the explicit formula?
(take your time)
a_n = 7n - 6
a_n = 6n - 7
a_n = 7n + 6
a_n = 6n + 1
Answer explanation
When n=1, the value is 7. But we need to find when n=0. So, just subtract 7 by 6 (the rate) to find n=0
Tags
CCSS.HSF.BF.A.2
7.
MULTIPLE CHOICE QUESTION
30 sec • Ungraded
How do you feel so far about the topic?
Good!
Um... not so good
Bad
Answer explanation
Dont worry, we will work on this more. Don't rush, and read the question carefully
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