Constant and Proportionality

A proportional relationship can be written as an equation in the form ____ = _____  _____

• y = k+x
• y = k-x
• y = kx
• linear y = k/x

The constant of proportionality can be found by finding the __________  _____________.

• unit rate
• ratio rate
• proportion answer
• rational number

When we compare variables, we compare them as _____ over ______. 

• peanut butter over jelly
• x over y
• rate over one
• y over x

The constant of proportionality in the equation y = 4x is ________

• y
• 4
• x
• =

The constant of proportionality in the equation y = ½x is _______. 

• x
• y
• 1/2
• 2

The equation y = 5x + 2 is not a proportional relationship because __________________________

• 5 can't be a constant of proportionality
• proportional relationships don't have addition
• it is a proportional relationship
• proportional relationships can't have an equation

The equation y = 3x represents a proportional relationship. The value of y when x= 7 is __________

• 21
• 7
• 10
• 4

The equation y = ¼x represents a proportional relationship. The value of y when x = 18 is _____________

• 18.25
• 18
• 4.5
• 81

One of these tables represents a proportional relationship.
 
 A                        B
x   y                   x   y
5   8                   4   6
6   10                12  18
7    11               16   24
Table _____ represents a proportional relationship. The equation is ____ =  ___ ___

• Table A, y = 1.6x
• Table A, y = 0.625x
• Table B, y = 1.5x
• Table B, y = 2/3x

A 6-ounce solution is made with 4mg of sodium. The equation that represents the relationship of mg to ounces is ___ = ____ _____. A 20-ounce solution would need ______mg of sodium.

• y = 3.3x, 13.3mg
• y = 5x, 120mg
• y = 1.5x, 30mg
• y = 2/3x, 13.3mg