True or False-A relation is a set of ordered pairs
What is TRUE?
State the domain and range:
x | y |
3 | 7 |
5 | 9 |
3 | 8 |
D: {3, 5} R: {7, 8, 9}
Evaluate f(x)=-3x if x=2
What is -6?
What is the definition of domain?
A set of input values (all values of x).
Is it a function? {(2, 3), (4, 5), ( -2, 6)}
What is YES because the domain does not repeat?
State the domain and range:
D: {1, 2, 3, 4, 5, 6}
R: {-1, 0, 1, 2, 3, 6}
Evaluate f(x)=2x+1 if x=-2
What is -3?
What is the definition of range?
The set of output values (all values of y).
Using the vertical line test does the graph of the points (1,3) and (1,5) represent a function?
What is False, the points fail the vertical line test
State the domain and range:
D: (-∞, -4]
R: All real numbers
Evaluate f(x)=-3 - x if x=6
What is -9?
What is the definition of a function?
A relationship between input and output values. Each input has exactly one output value.
Is it a function?
x | y |
2 | 4 |
1 | 5 |
2 | 6 |
What is NO because the domain x=2 repeats
x y
3 7
4 7
5 7
Domain: 3,4,5
Range: y7
Evaluate f(x)=25 + 4x if x=5
What is 45?
What is the definition of an independent variable?
A variable whose values affect the values of another variable (dependent variable). It is usually found on the x-axis of a graph.
Is it a function?
No, because it fails the Vertical Line Test.
What is the domain and range? {(2, 3), (4, 5), ( -2, 6)}
Domain: -2,2,4
Range: 3,5,6
Evaluate f(x)=-(4x+2) if x=7
What is -30
What is the test to tell if a graph is a function?
Vertical Line Test