Your answer is in the attachment.
Y = 3.8x + 17.4
y = (3.8 x 3) + 17.4
y= 11.4 + 17.4
y = 28.8
28.8 words per minute for a person who has owned a computer for 3 years
5p + 2,000,000 = 22,500,000
5p = 20,500,000
p = 20,500,000/5
p = 4,100,000 population in 1950
