Proportionality Equation

Determine the constant of proportionality for the table. Express your answer as y = kx

• y = 1/2x

• x = 1/2y

• y = 2x

• k = x

Tags

CCSS.7.RP.A.2B

Determine the constant of proportionality for the table. Express your answer as y = kx

• 15k

• x = 15y

• y = 0.06x

• y = 15x

Tags

CCSS.7.RP.A.2B

Which equation matches the constant of proportionality?

• x = y

• y = x

• y = kx

• l x w

Tags

CCSS.7.RP.A.2C

Select ALL equations that are proportional.

• y = 3x

• y = 25x

• y = 7x

• y = 2x - 1

• y = 4000x

Tags

CCSS.7.RP.A.2C

Which equation shows a proportional relationship between x and y? (a)  

• y = 3x + 9

• y = 1/2x

• y = 1/2x - 2

• y = x2

Tags

CCSS.7.RP.A.2C

Write how to find the proportion of

2:8 :: 25:625

(Do not give space first right the means than the extremes.)

Mathematical Equivalence

ON

Tags

CCSS.7.RP.A.3

Does each equation represent a proportional relationship? Choose Yes or No.

y = 13x - 7 ​ (a)  

y = 13x ​ (b)  

• no

• yes

Answer explanation

The first equation y = 13x - 7 does not represent a proportional relationship because it has a y-intercept that is not zero. A proportional relationship must have a y-intercept of zero. The second equation y = 13x does represent a proportional relationship because it has a y-intercept of zero.

Tags

CCSS.MATH.CONTENT.7.RP.A.2.b

CCSS.MATH.CONTENT.7.RP.A.2.c

In the equation y = 14x, what is the constant of proportionality?

• y

• x

• 14

Tags

CCSS.7.RP.A.2B

If the constant of proportionality is 10, which of the following is the correct proportional equation?

• 10=kx

• 10=k

• y=10k

• y=10x

Tags

CCSS.7.RP.A.2C

The equation y=5x describes a proportional relationship between x and y. What is the constant of proportionality?

• 6

• 4

• 7

• 5

Tags

CCSS.7.RP.A.2B