Respuesta :

You can use the acceleration formula: 

[tex] a = \frac{\Delta v}{\Delta t} [/tex]
[tex] a = \frac{1 - 3 }{4 - 0} [/tex]
[tex] a = \frac{-2 }{4} [/tex]
[tex] a = -\frac{1 }{2} = -0.5 [/tex]