Evaluate the function for the given value of x, and write the input x and output f(x) as an ordered pair
f(x)= 10x+4 x=5
What is (5,54)?
100
You can write a formual for a _ function as y=kx, where k =0.
What is direct variation?
100
For each fuction, determine whether y varies directly with x. If so, find the constant of variation and write the function rule.
X Y
5 10
6 12
7 13
What is no, Y does not varie with x?
100
Name the domain and range.
(3,5) (9,67) (23, 57) (86,62)
What is Domain: 3, 9, 23, 86
Range: 5, 67, 57, 62 ?
200
A _ is a relation in which each element of the domain corresponds with exaclty one element of the range
What is a function?
200
Evaluate the function for the given value of x, and write the input x and output f(x) as an ordered pair
f(x)= 12x + 3 x=3
What is (3, 39)
200
The formula y/x= k says that, except for (0,0), the ratio of all output-input pairs equals the constant k, the ______.
What is constant of variation?
200
For each fuction, determine whether y varies directly with x. If so, find the constant of variation and write the function rule.
X Y
12 36
14 42
16 48
What is 3x?
200
Evaluate each function for the given value of x and output
f(x) as an ordered pair
f(x)= 13x + 10 x= 3
What is (3, 49)
300
The _ states that if a vertical limme passes through more than one point in the graph of a relation, then the relation is not a function.
What is the vertical-line test?
300
List the domain and range for each relation.
(3,5) (67,3)(89,49) (72,23) (13,64)
What is
domain: 3, 67, 89, 72, 13
range: 5, 3, 49, 23, 64
300
what x-values should you use to make a table of values?
y = 3/4x
What is the constant of variation is a fraction?
Use the multiples of the denominator for x. This ensures integer values for y.
300
Determine whether y varies with x. If so, find the constant of variation.
y= 5x
What is yes ; 5?
300
determine whether y values directly with x. If so, find the constant of variation.
y - 4x =0
What is yes? 4
400
A _ is an equation that represents an output value in terms of an input value.
What is a function rule?
400
Write a function rule to model the cost per month of a long-distance cell phone calling plan. Then evaluate the function for the given number of minutes
Monthly service: $10
Rate is:$.50 per minute
Minutes used: 135
What is C(m)= .50m + 10
m= 135
400
How do you find the constant of variation?
x y
1 2
2 6
3 8
y = 2/1 = 6/3 = 8/4 = 2, so the y varies directly with x
What is the constant of variation is the ratio of any y-value to the corresponding x-value?
400
Determine whether y varies with x. If so, find the constant of variation.
y= 3x - 4
What is no?
400
For this exercise y varies directly with x.
If y=8 when x= -2,
find x when y= 18
What is x= -9?
500
You can write a function rule in a ___.
What is a function notation?
500
Your on a trip in California, you need a rental car. To rent the car is $18 and $.23 a mile. You drive 273 miles. Write this in a function.
What is C(m)= .23m + 18
M= 273
500
Some quantities are in a relationship whee the ratio of corresponding values is ______?
What is constant?
500
For this exercise y varies directly with x.
If y = 3 and x= 4, find x when y=16
What is 4?
500
For this exercise y varies directly with x.
y + 4 = 5x