Pls let f(x)=2/5 x^2−2 . the function g(x) is a vertical stretch of f(x) by a factor of 2. what is the equation of g(x)? enter your answer in the box.

Expansions and compressions are transformations that change the length or width of the graph of a function.

 To graph y = a*f (x)
 if a> 1, the graph of y = f (x) is expanded vertically by a factor a. 
 We have then:
 f (x) = 2/5 x ^ 2-2
 The function g (x) is a vertical stretch of f (x) by a factor of 2:
 g (x) = 2f (x)
 g (x) = 2 (2/5 x ^ 2-2)
 g (x) = 4/5 x ^ 2-4

 
 The equation of g (x) is: 
 g (x) = 4/5 x ^ 2-4

1+1=22×1=22-1=11-1=1duh