Question

Which equation has a constant of proportionality equal to 2?

Answer 1

Answer:

A

Step-by-step explanation:

The equation $y=kx$ describes the proportional relationship between variables x and y. In this equation, k is the coefficient of proportionality.

Consider all options:

A. For the equation

$y=\dfrac{10}{5}x,$

the coefficient of proportionality is

$k=\dfrac{10}{5}=2$

B. For the equation

$y=\dfrac{2}{2}x,$

the coefficient of proportionality is

$k=\dfrac{2}{2}=1$

C. For the equation

$y=\dfrac{2}{4}x,$

the coefficient of proportionality is

$k=\dfrac{2}{4}=\dfrac{1}{2}$

D. For the equation

$y=\dfrac{22}{22}x,$

the coefficient of proportionality is

$k=\dfrac{22}{22}=1$