Question

A proportional relationship between y and x. When x = 5, y=−7 .
What is the constant of proportionality, k?
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Answer 1

Answer:

k = - $\frac{7}{5}$

Step-by-step explanation:

The equation relating the quantities is

y = kx ← k is the constant of proportionality

To find k use the condition when x = 5 , y = - 7 , then

- 7 = 5k ( divide both sides by 5 )

- $\frac{7}{5}$ = k