<PRE><B>Question 61431</B>
You purchase a prepaid telephone card.  The card costs $12.00.  Each minute you 
      use costs $0.30.  

a)Determine the slope of the line that models these points.
 The variable cost is the slope, m=.30

b)Find the equation of the line for this graph.
The fixed cost is, b=12
The slope intercept form of a line is {{{highlight(y=mx+b)}}}
y=.30x+12
:
Happy Calculating!!!  
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