# 3 questions please help

**Question description**

1.

A small business buys a computer for $4600. After 4 years the value of the computer is expected to be $200. For accounting purposes the business uses *linear depreciation* to assess the value of the computer at a given time. This means that if *V* is the value of the computer at time *t*, then a linear equation is used to relate *V* and *t*.

(a) Find a linear equation that relates *V* and *t*.

2.

The monthly cost of driving a car depends on the number of miles driven. Lynn found that in May her driving cost was $310 for 500 mi and in June her cost was $410 for 700 mi. Assume that there is a linear relationship between the monthly cost *C* of driving a car and the distance driven *d*.

(a) Find a linear equation that relates *C* and *d*.

(b) Use part (a) to predict the cost of driving 1700 mi per month.

The manager of a furniture factory finds that it costs $2200 to manufacture 100 chairs in one day and $4600 to produce 300 chairs in one day.

(a) Assuming that the relationship between cost *C* and the number of chairs produced *x* is linear, find an equation that expresses this relationship.

(c) What is the

*y*-intercept of this line, and what does it represent?

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