me assume thats 2 points & yu want a strate line tween em
(-3,-1) & (0.5,2)
deltax=0.5-(-3)=3.5
deltay=2-(-1)=3
slope=deltay/deltax=3/3.5=0.357142857
projekt 1 point tu x=0...deltax=3, so deltay=9/3.5=2.5714285
y=-1+2.5714285=1.5714285....the point (0,1.571428)
line: y=0.357142857x +1.57142857