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Anit [1.1K]
3 years ago
15

Which equation represents a proportional relationship?

Mathematics
2 answers:
Verizon [17]3 years ago
5 0

y = 3 x equation represents a proportional relationship.

Answer: Option B

<u>Step-by-step explanation:</u>

A proportional variation represents a relationship between two variables x and y. It can be expressed in the form y=k x. Here, the ‘k’, the proportionality constant is equal to the slope m and the line goes through the origin

case A) y=2\left(x+\frac{1}{3}\right)

A linear equation that not passes through the origin and so not proportional variation

case B) y= 3 x

Is a linear equation but passes through the origin and so proportional variation

case C) y = - 3x+2

A linear equation that not passes through the origin and so not proportional variation

case D)  \text { D) } y=\frac{1}{2 x}

An inverse variation equation but not passes through the origin and so not proportional variation.

From these, equation option B is the proportion equation because in these equations, there is no addition and subtraction of any constant number. That’s why both these equations become proportional equations.

Nataliya [291]3 years ago
4 0

Answer:

B

Step-by-step explanation:

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The ratio of boys to girls in a school is 4:5. How many boys are in the school if there are 720 students.
scZoUnD [109]

Answer: 320 boys

Step-by-step explanation: you would first take the total number (720) and divide it by the total number shown in the ratio (5+4=9)

720/9= 80

You would then take 80 and multiply it by 4 because that is the number representing the boys

80*4= 320

7 0
3 years ago
20 PTS!! Which best describes the relationship between the line that passes through the points (1, -6) and (3,-2) and the line t
alina1380 [7]

Answer:

A

Step-by-step explanation:

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6 0
3 years ago
Read 2 more answers
Which statement is true? A. 2x – 1 = 13 and x = 6 B. 2x – 1 = 13 and x = 7 C. 2x + 1 = 13 and x = 7 D. 2x – 1 = 13 and x = 11
alexandr1967 [171]

Answer:

B. 2x – 1 = 13 and x = 7

Step-by-step explanation:

We are given 4 equations and a solution for each. We have to tell which of the given solution satisfies the given equation.

Option A.

2x -1 = 13 and x = 6

Using this value in the equation, we get:

2(6) -1 = 13

12 - 1 = 13

11 = 13, which is not true. Hence this option is not valid

Option B.

2x - 1 = 13 and x = 7

Using the value in the equation, we get:

2(7) - 1 =13

14 - 1 =13

13 = 13, which is true. Hence this option is valid.

Option C.

2x + 1 =13 and x = 7

Using the value in the equation, we get:

2(7) + 1 = 13

15 = 13, which is not true. So this option is not valid

Option D.

2x - 1 = 13 and x = 11

Using this value in the equation, we get:

2(11) - 1 = 13

21 = 13, which is not true. Hence this option is not valid.

6 0
3 years ago
Hey! please help i’ll give brainliest
Anuta_ua [19.1K]

Answer:

b

Step-by-step explanation:

5 0
3 years ago
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Multiply the expression (3y-8)(-c+y)
GarryVolchara [31]

Answer:

-3yc+3y2+8c-8y

Step-by-step explanation:

(3y-8)(-c+y)

3y(-c+y)-8(-c+y)

-3yc+3y2+8c-8y

8 0
3 years ago
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