3-1 Practice Graphing Linear Equations Determine whether each equation is a linear equation. Write or If yes, write the equation in standard form yes no. and determine the and x- y-intercepts. 1. 4xy + 2y = 9 2. 8x 3y = 6 4x 3. 7x + + 3 = y y – – 4. 5 2y = 3x 5. = 1 6. = 7 – – – Graph each equation. 7. = 2 8. 5x 2y = 7 9. 1.5x + 3y = 9 y – – 10. COMMUNICATIONS A telephone company charges $4.95 per month for long distance calls plus $0.05 per minute. The monthly cost of long c distance calls can be described by the equation = 0.05m + 4.95, where c is the number of minutes. m Find the of the graph of the equation. a. y-intercept b. Graph the equation. c. If you talk 140 minutes, what is the monthly cost? 11. MARINE BIOLOGY Killer whales usually swim at a rate of 3.2-9.7 kilometers per hour, though they can travel up to 48.4 kilometers per hour. Suppose a migrating killer whale is swimming at an average rate of 4.5 kilometers per hour. The distance the whale has traveled in hours can be d t predicted by the equation = 4.5t. d a. Graph the equation. b. Use the graph to predict the time it takes the killer whale to travel 30 kilometers.
3-1 Practice Graphing Linear Equations Determine whether each equation is a linear equation. Write yes or no. If yes, write the equation in standard form and determine the x- and y-intercepts. 1. 4xy + 2y = 9 2. 8x – 3y = 6 – 4x 3. 7x + y + 3 = y 4. 5 – 2y = 3x 5. – = 1 6. – = 7 Graph each equation. 7. – y = 2 8. 5x – 2y = 7 9. 1.5x + 3y = 9 10. COMMUNICATIONS A telephone company charges $4.95 per month for long distance calls plus $0.05 per minute. The monthly cost c of long distance calls can be described by the equation c = 0.05m + 4.95, where m is the number of minutes. a. Find the y-intercept of the graph of the equation. b. Graph the equation. c. If you talk 140 minutes, what is the monthly cost? 11. MARINE BIOLOGY Killer whales usually swim at a rate of 3.2-9.7 kilometers per hour, though they can travel up to 48.4 kilometers per hour. Suppose a migrating killer whale is swimming at an average rate of 4.5 kilometers per hour. The distance d the whale has traveled in t hours can be predicted by the equation d = 4.5t. a. Graph the equation. b. Use the graph to predict the time it takes the killer whale to travel 30 kilometers.
3.1-Practice-Graphing-Linear-Equations.docx