Introduction to Variables

What is a variable?

• A number in front of the variable

• A letter than represents an unknown number

• a number only

• a part of an expression

What is the variable in the expression 10 + 6y

What is a coefficient?

• A number in front of the variable

• A letter than represents an unknown number

• a number only

• a part of an expression

Sarah is bringing treats to her middle school class on her birthday. The number of treats she brings in is based on the number of students in her class.
t = the number of treats
s = the number of students
Which of the variables is dependent?

• s

• t

Which is the variable in the equation 3n+2=8

• 3

• 2

• 8

• n

5p + 4h - 2
Which are the variables? 

• 5p, 4h, 2

• 2

• p, h

• 5, 4

What are variables in math?

• Letters

• Numbers

• Expressions

What is the variable in 3x - 5

• x

• 5

• 3

Which of these are the variables?

• 5p, 4h, 2

• 2

• p, h

• 5, 4

The number you see before a variable (Example: 6z, the 6 is the ________)

• coefficient

• variable

• term

• product