The function g(x) is a vertical stretch of f(x) by a factor of 8. This means that every output value of f(x) is multiplied by 8 to get the corresponding output value of g(x). So we can write:
g(x) = 8*f(x)
We know that f(x) = 3/4x^2 - 1, so we can substitute this into the equation for g(x):
g(x) = 8*(3/4x^2 - 1)
Simplify:
g(x) = 6x^2 - 8
Therefore, the equation of g(x) is g(x) = 6x^2 - 8.