The decimal value of point M on the number line is 5.644.
Number line is a straight line divided with numbers placed at equal intervals or segments along its length.
From the question:
Point M = 5.6 + (4/9) * (5.7 - 5.6) = 5.644
The decimal value of point M on the number line is 5.644.
Find out more on number line at: https://brainly.com/question/24644930