Independent and Dependent Variables and Linear Equations

a consistent system of equations that has an infinite number of solutions

• dependent system

• independent system

• system of equations

A system of equations that has exactly one solution

• independent system

• dependent system

• consistent system

If y = 2x + 5 and x + 3y = 7, then x + 3(2x + 5) = 7 is an example of

• solving a system by graphing.

• solving a system by elimination.

• solving a system by substitution.

• solving a system by inverse operations

This is an example of a system of linear equations that are

• consistent and independent

• inconsistent

• inconsistent and independent

• consistent and dependent

Which is the dependent variable?

• x

• y

• -1/2

• 4

Which is the dependent variable?

• x

• y

• -1/2

• 4

What is the dependent variable in the equation y = 3x - 2?

• y

• x

• -2

• 3x

A phone company charges a base rate of $40 a month for service. The user is charged $0.20 a minute for every minute used. The total amount charge to the customer, p, for any number of minutes, m, can be represented by the function
p = .2m + 40.
What is the dependent variable?

• The # of minutes used

• The base rate of $40

• The total amount charged to the customer

• The $0.20 per minute

A consistent system that has infinitely many solutions is

• dependent

• consistent

• independent

• inconsistent

This is an example of a system of linear equations that are

• consistent and independent

• consistent

• inconsistent and dependent

• consistent and dependent