Equations in Two Variables

Which variable represents the output?

• x

• y

• z

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

Tell whether the ordered pair is a solution of:
y = x
(-3, 3) 

• Yes!

• No!

The equations y=128-8x gives the amount y (in fluid ounces) of milk remaining in a gallon jug after you pour x cups. Identify the independent and dependent variables.

• Because the amount y remaining depends on the number x of cups you pour, y is the dependent variable and x is the independent variable

• Because of the amount you pour x depends on the amount y that you have remaining, x is dependent and y is the independent

Tags

CCSS.6.EE.C.9

The equation y=10x+25 gives the amount y (in dollars) in your savings account after x weeks. Identify the independent and dependent variables.

• x (weeks) is dependent, y (in dollars) is independent

• x (weeks) is independent, y (in dollars) is dependent

Tags

CCSS.6.EE.C.9

The equation y=10x+25 gives the amount y (in dollars) in your savings account after x weeks. How much is in your savings account after 3 weeks?

Tags

CCSS.HSF.LE.B.5

The equation y=10x+25 gives the amount y (in dollars) in your savings account after x weeks. How much is in your savings account after 10 weeks?

Tags

CCSS.HSF.LE.B.5

Write an equation for the table.

• y=5x

• y=3x

• y=4x

• y=2x

Tags

CCSS.6.EE.C.9

Write an equation for the table based on the constant.

• y=4x

• y=1/8x

• y=1/4x

• y=1/2x

Tags

CCSS.6.EE.C.9

What is the equation for the graph?

• d=60t

• d=70t

• d=80t

• d=90t

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

The graph represents the cost c (in dollars) of buying n tickets to a baseball game. Write an equation in 2 variables that represents the graph.

• c=10n

• c=15n

• c=20n

• c=25n

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2