To plot the graph, we will use the intercepts to obtain two points on the line and connect these two point.
When x = 0
y = (-2/5) (0) - 3
y = 0 - 3
y = -3
First point = (0, -3)
When y = 0
0 = (-2x/5) - 3
(2x/5) = -3
Cross multiply
2x = 5 (-3)
2x = -15
Divide both sides by 2
(2x/2) = (-15/2)
x = -7.5
Second point = (-7.5, 0)
The two points are (0, -3) and (-7.5, 0). The graph is attached below
Hope this Helps!!!