In order to find the intercections of the line with x and y axis, you proceed as follow:
x - intercect:
equal the line equation to zero and solve for x:
y = -2x + 5
0 = -2x + 5
2x = 5
x = 5/2 = 2.5
y - intersect:
replace in the equation x=0 and calculate y:
y = -2(0) + 5
y = 0 + 5
y = 5
Hence, the intersections are x=5/2 and y=5 -> (5/2 , 5)
Next, you evaluate in the infinity, as follow:
x -> ∞ : y = 2(∞) + 5 = ∞, y-> ∞
That is, if x -> ∞, then also y->∞