Question

If f(x)=27 and x=9, What is the constant of variation of (k) for this function?

Hint: Use f(x)=kx and solve for k.

Give your answer as a number.

Answer 1

y = k * x 

When x = 7 then y = - 58 


- 58 = k * 7 Divide both sides with 7 

- 58 / 7 = k 


k = - 58 / 7 


y = k * x 


when x = 6 


y = - 58 * 6 / 7 


x = - 348 / 7
which would be -49.7