What is the slope of the line

the slope is b: -1/2

rise/run is an easy way to do it. Count the number of x-units between points and the number of y-units. in this case its 6 x-units and 3 y-units. y is rise and x is run, so it'll be 3/6 or 1/2 and it's negative because it's decreasing left to right.

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

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