The video tutorial explains the concept of continuity in functions, focusing on the equality of left-hand and right-hand limits. It demonstrates how to evaluate limits for continuous functions by plugging in values and solving for constants like K to ensure continuity in piecewise functions. The tutorial also includes graph interpretation to visualize continuity.

What is required for a function to be continuous at a point?

• The function must be differentiable at that point.

• The function must have a maximum at that point.

• The left-hand limit and right-hand limit must be equal.

• The function must be defined for all real numbers.

What happens if the left-hand and right-hand limits of a function are not equal?

• The function is continuous.

• The function has a local maximum.

• The function is differentiable.

• The function is not continuous.

How can you evaluate the limit of a continuous function as x approaches a point?

• By directly substituting the point into the function.

• By using L'Hôpital's rule.

• By calculating the area under the curve.

• By finding the derivative at that point.

In the example discussed, what is the value of K that makes the piecewise function continuous?

• K = 1

• K = 0

• K = 2

• K = -1

What type of graph would you expect if a piecewise function is continuous at a point?

• A graph with a jump discontinuity.

• A graph with a hole at that point.

• A graph with a vertical asymptote.

• A smooth, connected graph.