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y = 2x - 8

Step-by-step explanation:

To solve for slope, you need to use the formula:

m =

Then, plug in the numbers accordingly:

m =

m =

Simplify:

m = 2

Then to find the y-intercept, you take one of the coordinates (doesn't matter which one) and plug it into the equation:

Coordinate : (3, -2)

-2 = 2(3) + b

-2 = 6 + b

Subtract 6 from both sides:

-2 = 6 + b

-6   -6

_________

-8 = b

Put it all together:

y = 2x - 8

the answer is 13 cm

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