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OpenStudy (anonymous):
y=10x^2-5x+9 need to know whether this parabola is up or down and what point it crosses over the y-axis
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OpenStudy (anonymous):
well you can tell that the parabola is up because "a" in the equation ax^2+bx+c (which is 10) is positive. then to find the y intercept, which is called the minimum in this case, you plug in the numbers to -b/2a
OpenStudy (anonymous):
can you do this and tell me what you get?
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