The distance from zero on a number line.

if the number is positive, that is it's absolute value

if the number is negative, change it's sign to positive, and that is it's absolute value 

Find the absolute value of:

(a) -15

(b) 4.2563

(c) 16 - 23 

(d) -.0005 

(a) 15

(b) 4.2563

(c) 7

(d) .0005

The number in a power that is used as a factor

3⁴: 3 is the base

What is the base in:

(a) 56²

(b) (1/4)²

(c) 2x(3²)

(a) 56

(b) 1/4

(c) 3 

A polynomial with two terms

x + y

2x² + 3x

Which of these is a binomial?

(a) 2x² + 3x + 6

(b) 3xy² + 2x²y

(c) 5x + 6y + 1 

A number multiplied by a variable

2x: 2 is the coefficient 

What are the coefficients in this expression?

2x + 3y + 5 

2 is the coefficient of x, and 3 is the coefficient of y

5 is not a coefficient