If a phone card is usef to maje s long distance phone call yiu sre chsrged 0.75 per phone call plus an additional 0.20 per minut
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To get the that relates x and y, we choose two points on the table and use the equation of a straight line as follows:
Recall that the equation of a staight line is obtained from the formula
Using the points (30, 18) and (36, 24), we have
Recall that the equation of a staight line is obtained from the formula
Using the points (30, 18) and (36, 24), we have