Conic Sections

9000104809

Level: 
C
Among the following lines (which all pass through the point \([-1,3]\)) identify a line which is tangent to the following hyperbola. \[ (x + 2)\cdot (y - 2) = 1 \]
\(k\colon \ y = -x + 2\)
\(p\colon \ y = 3\)
\(q\colon \ x = -1\)
\(r\colon \ y = x + 4\)
None of the given answers is correct.

9000104801

Level: 
C
Consider the hyperbola \[ xy = -1 \] and a line \(p\) parallel to one of the axes but not identical with this axis. Find the true statement.
The line \(p\) has a unique intersection with the hyperbola.
The line \(p\) has two intersections with the hyperbola.
The line \(p\) does not have any intersection with the hyperbola.
We cannot draw any conclusion on the number of intersections of the line \(p\) with the hyperbola.

9000104803

Level: 
C
Consider the hyperbola \[ \frac{x^{2}} {16} -\frac{y^{2}} {4} = 1 \] and a line \(p\) parallel to one of the axes. Find the true statement.
We cannot draw any conclusion on the number of intersections of the line \(p\) with the hyperbola.
The line \(p\) has two intersections with the hyperbola.
The line \(p\) has a unique intersection with the hyperbola.
The line \(p\) does not have any intersection with the hyperbola.