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What is the equation of a line parallel to y = 4x - 12 that crosses the y-axis at 3?
What is the equation of a line parallel to y = 4x - 12 that crosses the y-axis at 3?
admin
2013-02-19
36
问题
What is the equation of a line parallel to y = 4x - 12 that crosses the y-axis at 3?
选项
答案
y = 4x + 3
解析
For two lines to be parallel, their slopes must be equal; therefore, in the standard equation y = mx + b, m = 4. You are given that the line crosses the y-axis at 3, so the y-intercept(b)must be 3. If you substitute 4 for m and 3 for b in the standard equation, you get y = 4x + 3.
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