Hi, to answer this question we have to analyze the information given:
<em>Developing cost: $9800
</em>
<em>Manufacture of each toy cost: $40
</em>
<em>Number of toys: n
</em>
So, a linear equation has the form: C = mn+b. In this case the total cost is C, and the number of toys is n . m is the cost of each toy because is multiplied by the number of toys manufactured.
b is the development cost, because it’s a constant that doesn’t change with the number of toys.