C-11-Q079mediumsingle_mcqঢাল mmm এবং (x1,y1)(x_1, y_1)(x1,y1) বিন্দুগামী সরলরেখার সমীকরণ—ay−y1=m(x−x1)y - y_1 = m(x - x_1)y−y1=m(x−x1)by+y1=m(x+x1)y + y_1 = m(x + x_1)y+y1=m(x+x1)cy=mxy = mxy=mxdy⋅x1=m⋅x⋅y1y \cdot x_1 = m \cdot x \cdot y_1y⋅x1=m⋅x⋅y1