Graph the line containing the point \( P \) and having slope \( m \). \( P=(-7,3) \); slope undefined

When a line has an undefined slope, it means that the line is vertical. This happens when all points on the line have the same x-coordinate. Since the point \( P \) is at \((-7, 3)\), the equation of the line is simply \( x = -7 \). This vertical line runs parallel to the y-axis and passes through all y-values while the x-value remains constant. You can visualize it as a straight line running straight up and down through the point \((-7,3)\). To graph this line, simply draw a vertical line that crosses the x-axis at \(-7\). It will extend infinitely in both the upward and downward directions. You can plot the point \( P \) on your graph to see where the line intersects the y-value of \( 3\).