Unknown Variables
If 3x - 21 = 12, what is x?
11
Y=3x +45 Where x = 4. What is Y.
57
What are the 4 ways linear relations can be represented?
Graph, table, algebraic expression/equation, pictograph
The coordinates of a graph are as followed (2,2), (4,4), (6,6) and (8,8) is this a linear relation.
yes
6x = 36. What is the value of x?
6
A statement that two mathematical expressions are equal and have the same value.
What is an algebraic equation/expression.
Halley's comet appears approximately every 76 years, since it was first recorded in the year 1758. What year did it appear for the 3rd time, including the sighting?
1910.
(22,55), (88,165), (166,205), (44,110). Is this a linear relation?
No
If X =9 solve 9x-76+6?
11
If T=2.5 then what is T-4
- 2.5
A school pays $125 to design gym T-shirts. It costs an additional $25 to make each T-shirt. How much would it cost to make 25 T-shirts?
$750
What is a linear relation?
A relation that appears as a straight line when graphed.
If X=122 and Y=153 What is 3x + 4y?
978
If x=50, Solve 50x.
2500
What is an easy way to complete a linear relation table?
Find and follow the patterns in x and y
Complete the table using y= 4n - 2
x y
1
2
3
4
2, 6, 10, 14
If b= 210 and y = 52, what is 2b + 2y + b + y
786
If 3x=78.87 then what is X x 68.65
What is 1804.8085
Harry scored 2 points in his first game of Quidditch. After that, he became better and was able to improve his score by 2 in every game after the next one. How many points did he have in his 5th game? Draw a table and find the algebraic expression.
x 1, 2, 3, 4, 5, 6
y 2, 4, 6, 9, 10, 12
y = 2x
What is the equation?
x y
0 1
1 4
2 7
3 10
y = 3x+1