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anonymous

  • one year ago

Which of the following could be the equation of the graph shown below? Please explain! [IMG] http://i60.tinypic.com/2hp3toh.jpg [/IMG]

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  1. marigirl
    • one year ago
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    \[A. y=-4x+2\] This means the graph has a gradient of -4 and also passes the y axis through +2 For the shown graph it does both the above things. It is a negative line and also passes the y-axis at 2. so TRUE \[B. 3x+2y=6\] \[2y=-3x+6\] \[y=\frac{ -3x }{ 2 }+3\] Make y the subject of the equation (i.e solved for y) This means the graph has a gradients of -3/2 and also passes the y axis at +3. For the shown graph it does both the above things. so TRUE \[c. y=5\] What this means is a horizontal line drawn where y=5. which is not the case for our given graph. so False \[D. 2x-y=7\] \[-y=-2x+7\] \[y=2x-7\] This means the graph is a positive graph with a gradient of 2 passing through y=-7 which is not our case. so A and B

  2. marigirl
    • one year ago
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    |dw:1443084794801:dw|

  3. anonymous
    • one year ago
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    Thank you so much for explaining!

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