uppose that y is directly proportional to x, and y = 150 when x = 15. What is the constant of proportionality?

Question

Responses
A

1 15
B

1 10
C 1010
D 15

Answer 1

To find the constant of proportionality, we can use the formula for direct proportionality:

y = kx

Where y is the dependent variable, x is the independent variable, and k is the constant of proportionality.

Given that y = 150 when x = 15, we can plug in these values to solve for k:

150 = k * 15

To solve for k, we divide both sides by 15:

k = 150 / 15
k = 10

Therefore, the constant of proportionality is 10.

Therefore, the correct answer is:

B

1 10