Chapter 8 - Section 8.1 - Review of Equations of Lines and Writing Parallel and Perpendicular Lines - Exercise Set - Page 575: 79

Substitute the respective x and y values into the equation and then simplify the equation (and see if the two sides of the equal sign are the same).

$2x-4y=7$ $(1.4,-1.05)$ $2x-4y=7$ $2(1.4)-4(-1.05)=7$ $2.8+4.2=7$ $7=7$ (true, so it is a solution) $(0,-1.75)$ $2x-4y=7$ $2*0-4(-1.75)=7$ $0--7=7$ $7=7$ (true, so it is a solution)