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Which equation describes a relationship that is directly proportional?

y= 9

y= 3x

y= .20

y= x + 4

2 Answers

1 vote
Y=3x.
If you were to plot it out, it would be a longest function with a positive slope.
User Khan Sharukh
by
8.8k points
5 votes

Answer:

B.
y=3x

Explanation:

We are asked to find the equation that describes a directly proportional relationship.

We know that two proportional quantities are in form
y=kx, where, y is proportional to x and k is the constant of proportionality.

Upon looking at our given choices, we can see that equation represented by option B is in form of direct proportional equation, where k equals 3.

Therefore, the equation
y=3x is direct proportional equation and option B is the correct choice.

User Dlsso
by
8.2k points

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