scalene ?
intersecting line.
Intersecting lines
Perpendicular?
A tangent line touches the circumference of a circle exactly at one point.
1.15
1.15
No. A pair of linear equation can have 0 solutions (they are parallel), or one solution (they cross at one point) or an infinite number of solutions (they represent the same line).
Yes. Remember that the intercepts are where the line crosses the axis. Since each axis is also a line this is the same as saying that any two lines that cross, cross at only one point. I wonder if a curved line could perhaps cross an axis twice.
Tangent
point of intersection.
It is a Geometry Theorem. "A line and a point not on the line lie in exactly one place" means what it says.