In a function, each input (x-) value has exactly one output (y-) value. That's not the case here, where we have (-4,5) and (-4,3) (two different y-values for one x-value). Eliminating either (-4,5) or (-4,3) will make this relation into a function.
Answer:
Graph B
Step-by-step explanation:
There is a clear relationship between the amount of money she earns and the cakes she sells
The equation to represent the relationship of the weights shown on the scale s 
The weights are given as:


The total weight on one side, where there are 4 small squares and 3 large squares is:



The total weight on the other side, where there are 2 small squares, 2 large squares and 1 triangle is:





The weight of the triangle is x.
So, we have:

The weights on both sides are equal, because the scale is balanced.
So, we have:

Hence, the equation is 
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Answer:
x.1 y.25
x.3 y.17
x.5 y.9
x.6 y.5
Step-by-step explanation: