anonymous
  • anonymous
Which of the following equations has this graph? Answer y = -1/2 x + 3 y = -2x +3 y = 3x - 2 y = 1/2x - 3
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
very confused
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.Sam.
  • .Sam.
The first thing you can tell it is either A or B because since the slope is |dw:1370916873409:dw| And the slope for both y = -1/2 x + 3 y = -2x +3 Is negative
anonymous
  • anonymous
First of all, the graph is decreasing, so the value that multiplies x have to be negative. f(0) = 3. You now can have the two first functions. But the root of the equation is 6. So, it's the first equation: -1/2x + 3.

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.Sam.
  • .Sam.
y=mx+c m is the slope
anonymous
  • anonymous
okay so once you have m what do you do Im still lost
.Sam.
  • .Sam.
Just use a coordinate from the graph, example (0,3) and (6,0) Find the slope, then use the point slope formula.
.Sam.
  • .Sam.
Slope formula is \[Slope=\frac{y_2-y_1}{x_2-x_1}\] Substitute and find slope You should get -1/2, then you'll know it's y = -1/2 x + 3
anonymous
  • anonymous
thanks

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