Question

the horizontal line that an exponential graph approaches but never touches is called the .

Explanation:

In the context of exponential functions (e.g., \( y = a^x \) or \( y = a^x + k \)), the horizontal line that the graph approaches as \( x \) goes to positive or negative infinity (depending on the function) but never intersects is defined as a horizontal asymptote. This is a key concept in the study of functions, especially in algebra and calculus when analyzing the end - behavior of graphs.

Answer:

horizontal asymptote