Write an Equation of the Line in Slope-Intercept Form s1

Name Date

Write an equation of the line in slope-intercept form.

1. 2.

Write an equation in slope-intercept form of the line that passes through the points.

3. 4.

5. 6.

Write an equation in slope-intercept form of the line with the given slope that passes through the given point.

7. 8.

In Exercises 9–12, use the graph that relates temperature y
(in degrees Fahrenheit) to altitude x (in thousands of feet).

9. Find and interpret the slope of
the graph.

10. Write an equation of the line.

11. Interpret the x-intercept of
the graph.

12. What is the temperature at 11,000 feet?

Name Date

13. A construction crew is extending a highway sound barrier that is 13 miles long. The crew builds ½ mile per week. Write an equation for the length y ( in miles) of the barrier after x weeks.

14. Water is filling a hot tub at a constant rate. After 20 minutes, the hot tub contains 18 inches of water. Sixteen minutes later, the hot tub contains
22 inches of water.

a. Write an equation that represents the amount y (in inches) of water in the hot tub after x minutes.

b. How many inches of water were in the hot tub before you started filling it?

15. After it is purchased, the value of a souvenir coin increases $20 each year. After 4 years the coin is worth $260.

a. Write an equation that represents the value V (in dollars) of the
coin x years after it is purchased.

b. What was the original value of the coin?

16. At the start of your lawn mowing job, your piggy bank contained $14 and you add $10 per week.

a. Write an equation that represents the amount y in your piggy bank

after x weeks.

b. Interpret the y-intercept.

c. How many weeks to you need to mow lawns in order to have $94.