Have learned about point slope form. It is one of the form to find the equation of the straight line with formula y-y1=m(x-x1). But how to find the equation without slope using point slope form?
What do you mean by "finding the equation without slope"? Because the line equation kind of has the slope in it, right?
If they give you two points, you can get the slope using the formula
for slope. If they want you to find the point-slope form or slope-intercept form, you'll have to get the slope at some point anyway. If they give you intercepts and ask for some other form, though, maybe you could do a different equation type without ever doing the slope explicitly.
What, exactly, does the exercise give you and then ask you do to?