The relation between the total cost y and the number of units made x is
y = 3x.
What is an equation?
An equation is a mathematical statement that proves two mathematical expressions are equal in algebra, and this is how it is most commonly used. In the equation 3x + 5 = 14, for instance, the two expressions 3x + 5 and 14 are separated.
Given:
The cost (the price) of each single item is $3 and the cost of 10 units is $30.
So, the relation between the total cost y and the number of units made x is
y = 3x.
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