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In how many ways can four students line up at a bus stop?
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y = 3x - 5 meets the x-axis at the x-intercept, and that happens when y = 0
3y + 2x = 2, meets the y-axis when x = 0, and that'd be the y-intercept
so let's find the equation of the line with points M and N in standard form, bearing in mind that
standard form for a linear equation means
• all coefficients must be integers, no fractions
• only the constant on the right-hand-side
• all variables on the left-hand-side, sorted
• "x" must not have a negative coefficient
