Model not linking to table in laravel php

I have a table named tasks and a model named Task. In my controller method when i run this piece of code

     <?php

        namespace App\Http\Controllers;

        use DB;
        //use app\Task;
        use DateTime;
        use Illuminate\Http\Request;
        use Illuminate\Support\Facades\Input;

        class Task_Controller extends Controller
        {
        //
             public function decide()
             {

             if ($input=="show all task")
             {
                  //$rows=DB::table('task')->get();
                  $rows=\App\Task::all();
                  foreach($rows as $values)
                  {
                     foreach($values as $key=>$val)
                     echo "$key  :  $val <br>";
                     echo "<br><br>";
                  }
              }
         }

It gives me following error: SQLSTATE[HY000]: General error: 1 no such table: tasks (SQL: select * from "tasks")

That is the model should have linked to the task table instead it is linked to the tasks table Why??.

How to make model gets linked to a specific table.

My model class code goes like this

       namespace App;

       use Illuminate\Database\Eloquent\Model;

       class Task extends Model
       {
          //
       }

via akshay