These data represent the population of a certain city.

Year Population(in thousands)
1950 18
1960 23
1970 29
1980 32
1990 38
2000 42
Use the line graph to predict the population in the year 2010

I recommend graphing the points, draw a best fit line, then project it to 2010.

I need help with this problem:
5p-2q=1
4p+5q=47