a) f(x) = 1,2x
lim (x → -∞) f(x) = 0+
lim (x → +∞) f(x) = ∞
Asymptote: y = 0
b) f(x) = 0,5x
lim (x → -∞) f(x) = ∞
lim (x → +∞) f(x) = 0+
Asymptote: y = 0
c) f(x) = 2 * 0,3x + 1
lim (x → -∞) f(x) = ∞
lim (x → +∞) f(x) = 1
Asymptote: y = 1
d) f(x) = -3 * 2,5x
lim (x → -∞) f(x) = 0-
lim (x → +∞) f(x) = -∞
Asymptote: y = 0