. High school algebra . een what hours did it rise most rapidly ? When did itfall most rapidly ? 9. The percentage of games won by a baseball team, up to thebeginning of each month of the playing season, was as follows : June, 66 ; July, 63 ; Aug., 60-5 ; Sept., 62 ; Oct., a graph showing these changes. 10. A boys height in inches, for each year from the age of 7 to theage of 14, was 44, 47, 50, 51, 52-5, 54, 56-5, 58. Draw a graph toillustrate the variations in his height. 21. Negative Numbers. This diagram shows the averagetemperature for a week. Thus on Monday it was 25°above zero
. High school algebra . een what hours did it rise most rapidly ? When did itfall most rapidly ? 9. The percentage of games won by a baseball team, up to thebeginning of each month of the playing season, was as follows : June, 66 ; July, 63 ; Aug., 60-5 ; Sept., 62 ; Oct., a graph showing these changes. 10. A boys height in inches, for each year from the age of 7 to theage of 14, was 44, 47, 50, 51, 52-5, 54, 56-5, 58. Draw a graph toillustrate the variations in his height. 21. Negative Numbers. This diagram shows the averagetemperature for a week. Thus on Monday it was 25°above zero, while on Thursday itwas 15° below zero. We might express this algebra-ically by saying that on Mondaythe temperature was +25°, and onThursday it was —15°. The number +25 is called apositive number and is read posi-tive 25 or plus 25, while —25 is called a negativenumber, and is read negative 25 or minus 25. A negative number is therefore one which is measured onthe opposite side of zero from a positive sxsrcise: 14 1. Using algebraic signs, write down the temperature for each dayin the diagram. Also read the temperature. 2. On what days was the temperature negative ? 30 ALOE BR A 3. How much higher was it on Monday than on Thursday ? Howmuch lower on Tuesday than on Saturday ? 4. If the temperature is —30° and it rises 40°, how much will itbe then ? If it had fallen 10, how much Avould it have been then ? 5. The temperature at which mercury freezes is —39°C. What doesthat mean ? How much lower is it than the normal temperatureof the blood which is 4-37°C. ? 6. If the price at which a certain stock sells above par is positiveand the price below par is negative, make a diagram similar to thepreceding, showing the prices of a certain stock for a week, when therecord was as follows : Mon., 4 above par ; Tues., 2 below ; Wed., 1 above,Thurs., at par; Fri., 3 below; Sat., H below. 22. Distances measured on a Horizontal Line. 9 B O AC I \ 1 \ 1 + \ \ \ 1 1 -
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