Question

Is y = 1/2x - 7 and y = x² + 1 a function?​

Answer 1

Divide both sides by 1-y. Divide both sides by 1−y. Dividing by 1-y undoes the multiplication by 1-y. Dividing by 1− y undoes the multiplication by 1−y. Subtract xy from both sides. Subtract xy from both sides.