Y varies inversely with x if y = 7 when x =-4, find y when x = 5
1 answer:
Answer:
y = - 
Step-by-step explanation:
Given y varies inversely with x then the equation relating them is
y = 
← k is the constant of variation
To find k use the condition y = 7 when x = - 4, then
7 = 
( multiply both sides by - 4 )
- 28 = k
y = 
← equation of variation
When x = 5 , then
y = 
= -
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