SOLUTION: Hello, i have problem on a word problem for linear equation. hope you can help me When making a telephone call using a calling card, a call lasting 5 minutes costs$1.45. A call

Question 1097145: Hello, i have problem on a word problem for linear equation. hope you can help me
When making a telephone call using a calling card, a call lasting 5 minutes costs$1.45. A call lasting 15 minutes costs $3.45. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that models the cost of making a call lasting x minutes.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Actually, you are given 2 points on a line, and
since 2 points dfine a line, you can plot the line.
The points are:
( 5, 1.45 )
( 15, 3.45 )
Use the general point-slope formula

Multiply both sides by

-------------------------------
check:
does it go through ( 5, 1.45 ) ?

OK
check ( 15, 3.45 )

OK
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