Vocabulary
The word for all of the x-values of a relations
domain
Is this a function? Why?
{(1,2), (2,6), (3,9), (4,1)}
Yes, it is a function.
True or false: if the graph of a function is not a straight line, then it is linear.
False
Sketch a distance vs. time graph of the following scenario:
Taylor Swift left her house to go to her concert. Her limo driver drove at a constant speed. Taylor performed. Then, on her way home, she stopped for a Subway sandwich. Finally, her limo driver dropped her off at home.
Check graph
What is the only number that has the same number of letters as its value?
Ex: the spelling TEN has three letters but a value of 10.
Four
The word for all of the y-values of a relation
range
Is this a function? Why?
{(3,0), (3,1), (3,2), (3,3)}
No, it is not a function
Is this function linear?
y=x2+8
No, the x is squared.
Translate the following into a function rule:
The output is 8 less than twice the input.
y=2x-8
What letter does every odd number have in it?
E
Define a function
A relation for which each input has EXACTLY ONE output
Is this a function? Why?
x y
1 4
3 6
5 9
7 2
Yes, it is a function
Is this function linear?
5x-9y=1
Yes, it can be written in y=mx+b form.
The slope is _____________ when a function is decreasing.
negative
The number zero was originally called
cipher
Test to see if a GRAPH is a function
Vertical line test (VLT)
The output is the product of the input and 49.
y=49x
True or false: the graph of a linear function must go through the origin.
False
Draw a graph that is NOT a function. Explain.
Answers vary. Must fail the VLT.
How many minutes are in a year?
525,600
y=mx+b
Is this a function? Why?
{(6,7), (7,7), (8,7), (9,7), (15,7)}
Yes, it is a function.
What is the range of the function y=3x+4 whose domain is {-6, 5, 10}?
The range is {-14, 19, 34}.
See table
On what day is Pi Day celebrated?
March 14th