Question

a local specialty delivery service charges a fee of $7 for each delivery plus. 45 cents for each mile over 10 miles. what variables are appropriate?

Answer 1

Answer: Independent variable = number of miles he drive over 10 miles

Dependent variable  = Total fee  (in dollars)

Step-by-step explanation:

Given : Charge for each delivery =  $7

Addition charge for each mile over 10 miles =  45 cents = $0.45

[ 1 cent = $ 0.01 ]

Since the fee vary by the number of miles he drive over 10 miles.

So , Independent variable = number of miles he drive over 10 miles

Dependent variable  = Total fee  (in dollars)

Let x= number of miles he drive over 10 miles

y= Total fee  (in dollars)

Such that , $y= 7+0.45x$   [Total fee= Fixed charge + Additional charge ]  

So , the appropriate  variables are:

Independent variable = number of miles he drive over 10 miles

Dependent variable  = Total fee  (in dollars)