The answer is c 6+15x+15x
Answer:
see explanation
Step-by-step explanation:
(a)
Given y is inversely proportional to x² then the equation relating them is
y =
← k is the constant of variation
To find k use any ordered pair from the table.
Using (1, 4 ) , then
4 =
=
( multiply both sides by 1
4 = k
y =
← equation of variation
(b)
When y = 25 , then
25 =
( multiply both sides by x² )
25x² = 4 ( divide both sides by 25 )
x² =
( take the square root of both sides )
x = ±
= ± 
Since x > 0 then x = 