Y varies inversely as x. If x= -5 then y =10. Find y when x=4

y = - 12.5

Step-by-step explanation:

Given y varies inversely as x then the equation relating them is

y = ← k is the constant of variation

To find k use the condition x = - 5 when y = 10, then

k = yx = 10 × - 5 = - 50

y = ← equation of variation

When x = 4, then

y = = - 12.5