Graphs
Check Powerpoint slide 1
D
Is domain and range x-values/y-values?
Domain is x values, range is y-values
What are the two "tests" that ordered pairs/graphs must pass to be a function?
Write a function that represents the situation:
C is 8 more than 1/2 of n
C= 1/2n +8
What are the next two numbers in the sequence?
5,8,11,14
17,20
Where is the function positive? (check slide 2)
(-4, ∞)
What is the domain? (0,1), (2,9),(-2,2),(9,3)
{-2,0,2,9)
Is this a function? (check slide 6)
No! 2 repeats in the x-value
A hot dog, d, costs $1 more than 1/2 the cost of a hamburger, h.
d(h)=1/2h+1
Is this sequence arithmetic, geometric, or neither?
4,8,16,32
geometric (r=2)
Where is the function negative? Check slide 3
[-5,3)
What is the range? (-2,7),(-1,4),(0,2),(1,4),(2,7)
{2,4,7}
Is this graph a function? (check slide 7)
Yes
The price, p, of an ice cream sundae is $4.80 plus $0.50 for each additional topping, t.
p(t)=4.80+0.50t
Is this arithmetic, geometric, or neither?
6,9,13,17
Neither
Where is the function increasing and decreasing? (check slide 4)
Inc: (-3,2)
Dec: (2,4)
Find the range of the function for the given domain:
f(x)=2x+7 {10,-2}
{3,27}
Is this a function? (check slide 8)
No, 1 repeats
2.5 more than the quotient of h and 3 is w.
w=h/3+2.5
Given the arithmetic sequence-write the explicit rule:
50, 60, 70, 80
A(n)=40+10n
Where is the function increasing and decreasing? (Check slide 5)
Dec: (-5,1)
Inc: (1,6)
Give two examples of discrete data and two examples of continuous data:
Answers may vary
If f(x)=2x+3, find f(3)
f(3)=9
7 less than three fifths of b is a
a=(3/5)b-7
Using the explicit formula, A(n)=6n-2, find the fifth AND tenth term of the sequence.
A(10)=58