Here is data from graph for the problem:
1970 - $1.60
1975 - $2.10
1980 - $3.10
1985 - $3.35
1990 - $3.80
1995 - $4.25
2000 - $5.15
Data above illustrates growth of minimum wage from 1970 through 2000. In 1970, minimum wage was $1.60 per hour. By 2000, it had increased to $5.15 per hour. Determine exponential growth function which models data for 1970 through 2000. Also, When did minimum wage reach $7.50 per hour?