Definitions
What are the two parts of a pattern rule that we need?
How it starts and how it continues.
Which pattern does this graph represent?
16, 13, 10, 7
What is the pattern rule using algebra for the pattern 5, 10, 15, 20?
5n
Dibora bought t-shirts for Christmas gifts. The first one cost $12, two cost $24 and three costs $36. Write an expression to represent this.
12n
17n-3
=17(4)-3
=68-3
=65
What is the number that you add or subtract every term of a pattern called?
The rate of growth
Which of these graphs represent the pattern 5, 10, 15, 20?
The second one!
What is the pattern rule using algebra for the pattern 5, 8, 11, 14?
3n+2
Carter saves $10 in November. He saves $6 more every month after. Create an expression to represent this.
6n+10
What is the 20th term in this pattern: 36-2n?
=36-2(20)
=36-40
=-4
What is the first term in a pattern called?
The initial value
The points (1, 7), (2, 10), (3, 13) and (4, 16) are plotted on a graph. What is the expression for this pattern?
3n + 4
What is the pattern rule using algebra for the pattern 20, 17, 14, 11?
23-3n
A soccer coach charges $20 per lesson plus a one-time registration fee of $15. Write an expression for the total cost.
20n+15
If 63 is the term value of this pattern what term number would it be in the pattern?
4n+3
63=4n+3
63=4(15)+3
63=63
What is a zero term?
The term that comes before the first term in our patterns.
What mistake did I make on this graph?
I flipped the ordered pairs.
Instead of (1,2), I did (2,1)
And instead of (2,6), I did (6,2)
What is the pattern rule using algebra for the pattern 10.5, 14, 17.5, 21?
3.5n +7
Gwenny's phone starts at 100% at the beginning of the day. Every hour her phone loses 8%. Write an expression that represents this pattern.
100-8n
How much more is the 70th term that the 9th term in this pattern?
7n+2
=7(70)+2 =7(9)+2
=492 =65
492-65= 427
The 70th term is 427 more than the 9th term.
What are the points that we graph on a coordinate grid called?
Ordered pairs.
27-6n
What is the pattern rule using algebra for the pattern 17, 10.5, 4, -2.5?
23.5 - 6.5n
Yom read 4 pages of his book last week. This week he read 2.5 pages of his book per day. What expression represents his second week of reading?
2.5n+4
What is the one hundred and twenty fifth term of the pattern 0.5n+8
0.5n+8
=0.5 (125)+8
=62.5+8
=70.5