Rate of Proportionality

A recipe says to use 3 cups of flour to make 48 cookies. What is the constant of proportionality that relates the number of cookies made, y, to the number of cups of flour used in, x?

• 0.6

• 48

• 3

• 16

A proportion is...

• Is a comparison of two quantities with a common denominator/unit.

• a ratio that compares two quantities of different units.

• a rate when the second quantity in the comparison ( aka the denominator ) is a unit of one.

• two ratios set equal to one another.

Which best describes the graph represented in this table?

•  proportional

• non-proportional

Which graph shows a proportional relationship?

• A

• B

• C

• D

Does this graph represent a proportional relationship?

• Yes 

• No

Write and equation in the form of y=kx for a line that passes through the ordered pair (3,9).

• y=1/3X

• y=6x

• y=3x

• y=9x

What letter stands for "constant of proportionality"?

• y

• x

• b

• k

Is the graph proportional or non proportional?

• proportional

• non proportional

Raven is famous for her chocolate chip cookies. She adds 3 cups of sugar for every 5 ounces of chocolate chips. What is the unit rate of chocolate chips to sugar in ounces per cup?

• 67 oz./cup

• 0.6 oz./cup

• 5 oz./cup

• 3 oz./cup

What are the two rules that make a graph proportional?

• Straight Line and goes through the Origin

• Straight Line and is very steep

• Curved Line and goes through the origin

• Passes through the point (1,0) and is a straight line