I have a list such as here:

`list1 = {{-(5/4), 3}, {-(3/4), 2}, {1/4, 6}, {3/4, 5}};`

My desire is to have a plot similar to (just in shape not in data)
[![enter image description here](https://i.stack.imgur.com/IceWZ.png)](https://i.stack.imgur.com/IceWZ.png)

however when I use of ListLinePlot, I just get a plot same as :
[![enter image description here](https://i.stack.imgur.com/NkkbM.png)](https://i.stack.imgur.com/NkkbM.png)

I guess I have to insert some zeros between my main data in list? if it is correct, how many zeros are needed?