I believe what the problem means is that the height of the child, if he/she grows in height, the mesurements are equal to 1 ft, 2 ft, 3 ft, 4 ft, etc only. and no decimals or fractions in between. it is also said that a human stops growing at the age of 20 naturally, hence with this increment, a child can grow incredibly very tall.
First one is -3
Second one is 1
The residual value is -1.14.
Plug 5 into x
y=-0.7(5)+2.36
=-1.14
