More test 2 review questions:

1. Find the equation of the line in slope intercept form that passes through (3, -2) and (5, 1).

2. Find the equation of the vertical line passing through (5, 7).

3. Graph the line 3x=7.

4. Find the equation of the horizontal line passing through (2, 4).

5. Find the equation of the line parallel to 3x -5y = 7 passing through the point (5, 1).

6. In 1990 the US population was 248.7 million people. In 2000 the population had increased to 281.4 million. Find a linear model that represents the U.S. population in terms of the year from 1990. Use the model to predict the population in 2004. When would the population be 340 million?

7. The value of a set of 35 dimes and nickels is worth $2.75. How many of each coin do you have?

8. Coach Leslie heads for Florida with most of the swim team leaving at 6 a.m. and averaging 62 mph. Captain Soffa leaves with the rest of the swimmers at 9 a.m. and averages 71 mph. At what time does Ms. Soffa catch up to her coach?

9. Mark, the chemist, mixes 5ml of a 75% acid solution with a 42% acid solution. How many milliliters of the 42% solution does he need to create a 60% acid solution?

10. A five quart radiator has a 45% antifreeze solution in it. Some of this is drained and replaced with pure antifreeze to create a 55% antifreeze solution. How many quarts were drained and then replaced with pure antifreeze? (Very difficult)

11. Laure invests $20,000 into three accounts, stocks, bonds and foreign investments. She has $2,000 less than three times the amount she invested in the foreign market in bonds. The stocks earned an interest rate of 4%, the bonds 3% and the foreign accounts 5%. The return on her account after one year was $740, how much was invested in bonds?

12. proportions…

13. Solve for a variable explicitly.

14.