Question

the variables x and y have a proportional relatinship and y=2/5 when x=5/8 which equation represents this relationship

Answer 1

The equation is y = 16/25 x

lets find the proportional relationship,

y = kx

2/5 = k * 5/8

k = (2/5) /  (5/8)

k = 16/25

so if k, constant is 16/25

equation is:

y = 16/25 x

What are proportional relationships?

Proportional relationships are relationships between two variables where their ratios are equivalent. Another way to think about them is that, in a proportional relationship, one variable is always a constant value times the other. That constant is know as the "constant of proportionality".

How do you find the proportional relationship in an equation?

The equation that represents a proportional relationship, or a line, is y = k x , where is the constant of proportionality. Use k = y x from either a table or a graph to find k and create the equation.

To learn more about proportional relationship from the given link

brainly.com/question/2143065

#SPJ4

Answer 2

Answer:

y = 16/25 x

Step-by-step explanation:

Formula: y = kx

2/5 = k(5/8)

(multiplying each side by 40)

16 = k(25)

k = 16/25

y = 16/25 x