4. Slope Comes from the French verb monter Which means to climb or to rise

7. Change in y

8. Change in y Change in x

9. Change in x

22. Two nonvertical lines are PARALLEL if and only if they have the same slope.

25. 6:ZStandard

28. Two nonvertical lines are PERPENDICULAR if and only if their slopes are negative reciprocals

32. 5:ZSquare

33. Which of the following pairs of lines are parallel, perpendicular or neither?

37. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227

38. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227 Weight on earth xy Weight on moon

39. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227 1401501301200 30 20 25 160 xy

40. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227 1401501301200 30 20 25 160 xy

41. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227 xy 1) Determine The Slope 2) Determine a linear equation representing the weight y of a person on the moon as a function of his weight x on the earth m = y = mx + b

42. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227 xy 1) Determine The Slope 2) Determine a linear equation representing the weight y of a person on the moon as a function of his weight x on the earth m = y = mx + b

43. weight on earth (lb) weight on moon (lb) 12020 13222 15626 16227 xy 3)What is the weight of a man on the moon if his weight is 180 pounds on earth?

45. The temperature at which water freezes is 0 o C or 32 o F The temperature at which water boils is 100 o C or 212 o F Use this data to find a linear function that relates Celsius temperature to Fahrenheit temperature.

46. Let the independent variable F stand for the Fahrenheit temperature Freezes at 0 o C or 32 o F Boils at 100 o C or 212 o F

47. Let the independent variable F stand for the Fahrenheit temperature Let the dependent variable C stand for the Celsius temperature Freezes at 0 o C or 32 o F Boils at 100 o C or 212 o F

59. Fahrenheit CelciusCelcius

60. [0,225] x scale:25 by [0,100] y scale: 20

61. Convert 78 degrees Fahrenheit to Celsius 78 degrees Fahrenheit is 25.6 Celsius

63. Give a verbal interpretation of the slope

66. There is a 5 degree change in the Celsius temperature. For every 9 degree change in the Fahrenheit temperature.

68. For every 5 degree change in the Celsius temperature. There is a 9 degree change in the Fahrenheit temperature.