Unit Rates and Constant of Proportionality

What is the constant of proportionality in the equation  y = 2.5x?

(a)  

Tags

CCSS.7.RP.A.2B

How do you create an equation for our tables and graphs? ( * means multiplication)

• x = constant of proportionality * y

• y = constant of proportionality * x

• x = a unit rate * y

• y = a unit rate * x

Tags

CCSS.7.RP.A.2C

What is a constant of proportionality?

• a comparison of two numbers with different quantities or units

• the ratio of two different units, with denominator as 1

• the ratio between two proportional quantities set up as y/x

• the ratio between two proportional quantities set up as x/y

Tags

CCSS.7.RP.A.2B

Is this table proportional?

• Yes, same constants of proportionality

• No, there are different constants of proportionality

Tags

CCSS.7.RP.A.2A

What is the constant of proportionality in the equation y = 5/9x?

(a)  

Tags

CCSS.7.RP.A.2B

Which equation has a constant of proportionality equal to  9?

• y = 81/3x

• y = 1/9x

• y = 3x

• y = 63/7x

Tags

CCSS.7.RP.A.2B

Which equation has a constant of proportionality equal to 1

• y = 10/11x

• y = 87/88x

• y = 3/15x

• y = x

Tags

CCSS.7.RP.A.2B

Dylan makes $336 for 32 hours of work, and Angela makes $420 for 42 hours of work. Are their wages proportional?

• yes, same rate of pay

• no, different rates of pay

Tags

CCSS.7.RP.A.2A

Which graph is proportional?

• Table 1

• Table 2

Tags

CCSS.7.RP.A.2D

What is the constant of proportionality?

(a)  

Tags

CCSS.7.RP.A.2B