3. The music website 'Totally Tunes' charges for song downloads according to the graph below. Write an equation to model this situation. Totally Tunes 17 16 15 14 13 12 11 10 2 1 1 2 3 4 5 6 7 Number...


3. The music website 'Totally Tunes' charges for song downloads according<br>to the graph below. Write an equation to model this situation.<br>Totally Tunes<br>17<br>16<br>15<br>14<br>13<br>12<br>11<br>10<br>2<br>1<br>1<br>2<br>3<br>4<br>5<br>6<br>7<br>Number of Songs<br>Solution : Using the general formula C = (rate per item)n + (fixed amount)<br>We must determine the fixed amount: it is the vertical intercept on the graph,<br>which is 7.<br>Then we must determine the rate per song by calculating the slope of the line,<br>which is 1.50$/song<br>*(choose two points on the line and determine rise and run, slope = un<br>rise )<br>So the equation is :<br>C = (rate per item)n + (fixed amount)<br>C = 1.50n + 7<br>Cost ($)<br>

Extracted text: 3. The music website 'Totally Tunes' charges for song downloads according to the graph below. Write an equation to model this situation. Totally Tunes 17 16 15 14 13 12 11 10 2 1 1 2 3 4 5 6 7 Number of Songs Solution : Using the general formula C = (rate per item)n + (fixed amount) We must determine the fixed amount: it is the vertical intercept on the graph, which is 7. Then we must determine the rate per song by calculating the slope of the line, which is 1.50$/song *(choose two points on the line and determine rise and run, slope = un rise ) So the equation is : C = (rate per item)n + (fixed amount) C = 1.50n + 7 Cost ($)

Jun 11, 2022
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