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If the equation y = 3x - 18 were graphed on the coordinate axes above

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If the equation y = 3x - 18 were graphed on the coordinate axes above  [#permalink]

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New post 08 Jan 2019, 22:59
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If the equation \(y = 3x - 18\) were graphed on the coordinate axes above, then the graph would cross the y-axis at the point (x, y) where


A. x = 0 and y = 18

B. x = 0 and y = -18

C. x = 0 and y = 6

D. x = 6 and y = 0

E. x = - 6 and y = 0

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Re: If the equation y = 3x - 18 were graphed on the coordinate axes above  [#permalink]

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New post 08 Jan 2019, 23:21
Bunuel wrote:
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If the equation \(y = 3x - 18\) were graphed on the coordinate axes above, then the graph would cross the y-axis at the point (x, y) where


A. x = 0 and y = 18

B. x = 0 and y = -18

C. x = 0 and y = 6

D. x = 6 and y = 0

E. x = - 6 and y = 0


IMO B

\(y = 3x - 18\) were graphed on the coordinate axes above, then the graph would cross the y-axis at the point (x, y)
This means that (x, y) will satisfy the line.

Out of the 5 options ,Only B and D, satisfies the equation of line

Out of which only B is having y as -ive

Another method would be(Visualization),
Calculate 2 points which will satisfy the equation, x = \(\frac{y+18}{3}\)
You will get x=7 & y=3 and y=-3 & y = 5
This line when plotted on the graph, will have a +ive slope, and be cutting across Y across (0,-18).
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Re: If the equation y = 3x - 18 were graphed on the coordinate axes above  [#permalink]

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New post 08 Jan 2019, 23:22
Imo B

Bcz x=0 , at the point where line crosses y axis
Therefore y=-18

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Re: If the equation y = 3x - 18 were graphed on the coordinate axes above &nbs [#permalink] 08 Jan 2019, 23:22
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