Question 1169299
let 2000=0 and 2009=9
(0, 502)
(9, 424)
slope is -78/9
point slope formula is y-y1=m(x-x1) m slope, (x1, y1) point
y-502=-(78/9)x. (or y-424=-(78/9)(x-9))
y=-(78/9)x+502
in 2021, x=21
so y=-(78/9)*21+502
=-182+502=320 per 100,000 people 
expect 1280 violent crimes in city with pop of 400,000