Answer:
k = - [tex]\frac{7}{5}[/tex]
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 )
- [tex]\frac{7}{5}[/tex] = k
