Which equation has a constant of proportionality equal to 1? A. y=10/11 x
B. y=7/8 x
C. y=3/15 x
D. y= x​

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“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

25% increaseplus i think decrease i only know increase: ((