me assume yu want a strate line tween the 2 points
(-3,7) & (4,-2)
deltax=4-(-3)=7
deltay=-2 -7=-9
slope=deltay / deltax=-9/7
slope= -1.2857142
projekt from x=-3 tu x=0...deltax=3,
so deltay=-(9/7)*3 =-27/7 =-3.8571428
y=7-3.8571428 or -3.1428572
this point=(0,-3.1428572)