Mark M. answered 05/21/21
Retired college math professor. Extensive tutoring experience.
The graph of y = 5x lies above the x-axis and approaches the x-axis as x→ -∞.
So, y = 0 (the x-axis) is the horizontal asymptote for y = 5x.
The graph of y = 5(x-2) +3 is obtained from the graph of y = 5x by translating the graph of y = 5x two units to the left and three units upward.
So, the horizontal asymptote is y = 3.