Question

1. Predict the height ( in cm) of boy

Answer 1

Answer:

Step-by-step explanation:

It'd be wise to say what is represented by each x and y.  I will assume that x represents the age of the child in months and y the height in cm.

Then, if the height is 115 cm, 115 cm = 0.58x + 72.27.  Must solve this for x:

     115 cm - 72.27 cm

x = ---------------------------- = 73.7 cm (about 29 inches, which is reasonable)

                 0.58

If the child is 30 months old, x = 30 and y (the height) is

0.58(30) + 72.27 cm = 89.7 cm (about 35.3 cm, also reasonable)