Question

Since Beth was born, the population of her town has increased at a rate of 850 people per year. Beth's 9h birthday, the total population was nearly 307,650. Write and solve a linear equation to find the population on Beth's 16th birthday.

Answer 1

$\frac{y-307,650}{x-9} = 850\\\\y-307,650 =850(x-9)\\\\multiply\\\\y =307,650 +850(x -9)\\\\y =307,650+850(16-9)\\\\y= 313,600$