Proportions and Equations

26 is 5% of what number?

• 1.3

• 2.5

• 25.95

• 520

Tags

CCSS.6.RP.A.3C

What number is 20% of 75?

• 15

• 60

• 6

• 1.5

Tags

CCSS.6.RP.A.3C

What percent of 17 is 3? (Round if needed)

• 18%

• 16%

• 12%

• 3%

34% of what number is 51?

• 69

• 71

• 150

• 196

Tags

CCSS.6.RP.A.3C

Does this equation represent a proportional relationship?

• Yes

• No

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

Proportional or Not Proportional?

• Proportional

• Not Proportional

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

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

Is this a proportional equation?  Why?

• It is not proportional because it doesn't have a constant.

• It is not proportional because it doesn't have a constant rate of change.

• It is proportional because if x = 0, y = 0.

• It is proportional because it has a y intercept of 22.

Tags

CCSS.HSF-LE.A.1B