Explanation:
the slope is the ratio of
y coordinate difference / x coordinate difference
so, a slope of 2/5 means to go from a point on the line 2 units up (y direction) and 5 units right (x direction).
the y intercept is the y value when x = 0.
in our case this means (0, 3) is a point on the line.
from there we go 2 up and 5 right giving us (5, 5) as a second point.
mark these 2 points and then draw a line through both points (extending beyond the points, of course).