The equation is 
Step-by-step explanation:
The bracket is denoted by the variable x.
The necklace is denoted by the variable y.
From given, Linda sells her bracket for $6.
Thus, the expression for bracket is
.
Also, Linda sells her necklace for $10.
Thus, the expression for necklace is
.
The equation for Linda sells her bracket and necklace is 
3 + (-4) is the same thing as 3 - 4.
3 - 4 = -1
Hope this helped :)
Answer:
f(x) = x/4
Step-by-step explanation:
To find the inverse of a function replace the positions of x and y. Then isolate y.
y = 4x
x = 4y
x/4 = y
f(x) = x/4