Question

show that the points A(1,2), B(-1,-16),C(0,-7) lie on the graph of linear equation y=9x-7.

Answer 1

if a point lie on a line on graph then the coordinates satisfies the equation of the line

A(1,2)
y=9(1)-7 = 2 satisfied

B(-1,-16)
y=9(-1)-7=-16 satisfied

simulation C will also satisfy the equation

Answer 2

if a point lie on a line on graph then the coordinate satisfies the equation of the line

A(1,2)

y=9(1)-7=2 satisfies

B(-1,-16)

y=9(-1)-7=-16 satisfies

automatically C will also satisfy the equation