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30 May, 17:14

On a recent day, 8 euros were worth $9 and 32 euros were worth $36. Enter an equation of the form y = kx to show the relationship between the number of euros and the value in dollars. Let y be the value in dollars and x be the number of euros.

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  1. 30 May, 17:20
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    Step-by-step explanation:

    Let y be the value in dollars and x be the number of euros.

    If we plot y on the vertical axis and x on the horizontal axis, a straight line would be formed. The slope of the straight line would be

    Slope, m = (36 - 9) / (32 - 8)

    m = 27/24 = 1.125

    The equation of the straight line can be represented in the slope-intercept form, y = mx + c

    Where

    c = intercept

    m = slope

    To determine the intercept, we would substitute x = 8, y = 9 and m = 1.125 into y = mx + c. It becomes

    9 = 1.125 * 8 + c = 9 + c

    c = 9 - 9 = 0

    The equation showing the relationship is

    y = 1.125x
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