Answer:
1.4 million households per year
Step-by-step explanation:
We have two points so we can use the slope formula
m = ( y2-y1)/(x2-x1)
= ( 63 -42)/(2014-1999)
21/15
7/5
The units are millions of households/ years
The answer is to be in decimal form
1.4 million households per year
