How can i make the ball in pong slower?

Question

ball then moves way too quick

    #Move the ball 
    ball.setx(ball.xcor() + ball.dx)
    ball.sety(ball.ycor() + ball.dy)

Answer 1

ball.setx(ball.xcor() + (ball.dx / 2))
ball.sety(ball.ycor() + (ball.dy / 2))

50% speed