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anonymous

  • one year ago

Part A: Sam rented a boat at $225 for 2 days. If he rents the same boat for 5 days, he has to pay a total rent of $480. Write an equation in the standard form to represent the total rent (y) that Sam has to pay for renting the boat for x days. (4 points) Part B: Write the equation obtained in Part A using function notation.(2 points) Part C: Describe the steps to graph the equation obtained above on the coordinate axes. Mention the labels on the axes and the intervals. (4 points)

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  1. anonymous
    • one year ago
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    @misty1212 , @jim_thompson5910

  2. misty1212
    • one year ago
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    HI!!

  3. misty1212
    • one year ago
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    what equation did you get?

  4. anonymous
    • one year ago
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    Hi

  5. misty1212
    • one year ago
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    looks good to me

  6. jim_thompson5910
    • one year ago
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    y = 85x + 55 is in the form y = mx+b m is your slope b is the y-intercept Since b = 55, this means you plot the point (0,55). Basically the point at 55 on the vertical y axis. This equation is a line, so you need 2 points. To get the next point, we use the slope 85 = 85/1 is the slope. The "85" up top means we move up 85 units, then we move 1 unit to the right to land on (1,140) So this graph is a straight line that goes through (0,55) and (1,140)

  7. misty1212
    • one year ago
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    slope is 85, y intercept is 55

  8. misty1212
    • one year ago
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    @jim_thompson5910 described how to graph it i think

  9. misty1212
    • one year ago
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    it is not that easy because the scale will have to be different for the y and the x

  10. anonymous
    • one year ago
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    I am so confused

  11. jim_thompson5910
    • one year ago
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    |dw:1440126087340:dw|

  12. misty1212
    • one year ago
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    you know how to graph a line in general?

  13. jim_thompson5910
    • one year ago
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    plot the y intercept which is 55 |dw:1440126097602:dw|

  14. anonymous
    • one year ago
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    yes @misty1212

  15. misty1212
    • one year ago
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    @jim_thompson5910 is graphing it

  16. jim_thompson5910
    • one year ago
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    plot the point (1,140) this point is found by going up 85 units, then to the right 1 unit |dw:1440126118938:dw|

  17. jim_thompson5910
    • one year ago
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    after you get those two points, you draw a straight line through them

  18. misty1212
    • one year ago
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    looks like you are being asked "how to graph it" i would start by saying put \((0,55)\) as the y intercept

  19. misty1212
    • one year ago
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    there should really be nothing to the left of 0, because the situation only makes sense for positive values of x (they are numbers of days)

  20. misty1212
    • one year ago
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    that is just something to plot you could plot \((0,55)\) and \((2,225)\) and \((5,480)\)

  21. jim_thompson5910
    • one year ago
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    you can also think of it like this y = 85x + 55 y = 85*1 + 55 ... replace x with 1 y = 85 + 55 y = 140 that work shown above tells us that when x = 1, y = 140. So that's another way to get the ordered pair (1,140) as misty1212 points out, other ordered pairs like (2,225) and (5,480) lie on the graph too. you can move along the line using the slope or plug in the x values to get corresponding y values

  22. anonymous
    • one year ago
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    okay.

  23. jim_thompson5910
    • one year ago
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    try out x = 4 for instance. If you were to plug that into y = 85x + 55, what do you get for the value of y?

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