Question

Graph y+5x+2.5=0 and (x,y):x->1)

Answer 1

$y+5x+2.5=0\ \ \ |-5x-2.5\\\\y=-5x-2.5\\\\for\ x=0\to y=-5\cdot0-2.5=-2.5\to(0;\ -2.5)\\for\ x=-1\to y=-5\cdot(-1)-2.5=5-2.5=2.5\to(-1;\ 2.5)$

Look at the picture.