Is the Equation a Proportion

Is this a direct proportion?

• yes

• no

Is this graph proportional?

• Yes

• No

Write a direct proportion equation for the graph

• y=2x

• y=24x

• y=4x

• y=16x

Two ratios, or fractions, that are equal.

• Reciprocal

• Mean

• Integers

• Proportions

Determine whether each pair of ratios forms a proportion

• Proportion

• Not a Proportion

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

• y = 3x + 9

• y = 1/2x

• y = 1/2x - 2

• y = x2

Tell whether the ratios form a proportion.

• Yes

• No

Determine whether each pair of ratios forms a proportion

• Proportion

• Not a Proportion

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

Do the ratios form a proportion?

• Yes, they form a proportion.

• No, they do not form a proportion.