Which of the following is NOT a linear function? y=x

y=5

y=-3x-5

y=x^2+6

Y=x^2 +6 . This would be graphed as a parabola. So it would curve down before changing direction and going back in the opposite direction. So it’s not linear function (a straight lined function)

“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 .