Calculate the annual temperature range, mean monthly temperature, annual rainfall, and describe the characteristics of the polygraph.

You're on a roll — Step 1: Calculate the annual temperature range. The annual temperature range is the difference between the highest and lowest monthly temperatures. Highest temperature = 29^ (June) Lowest temperature = 23^ (January) Annual temperature range = Highest temperature - Lowest temperature 29^ - 23^ = 6^ The annual temperature range is 6^. Step 2: Find the mean monthly temperature. The mean monthly temperature is the sum of all monthly temperatures divided by the number of months (12). Sum of temperatures = 23+24+25+27+27+29+28+27+26+25+24+24 = 316^ Mean monthly temperature = Sum of temperaturesNumber of months 316^12 ≈ 26.33^ The mean monthly temperature is 26.33^. Step 3: Determine the annual rainfall. The annual rainfall is the sum of all monthly rainfall amounts. Sum of rainfall = 5+10+33+40+60+100+75+40+30+15+5+5 = 418 mm The annual rainfall is 418 mm. Step 4: Describe the characteristics of the polygraph. i. It combines two types of graphs (bar graph for rainfall and line graph for temperature) on a single chart. ii. It uses two vertical axes (one for rainfall, one for temperature) and a common horizontal axis for months. iii. It allows for easy comparison and visualization of the relationship between rainfall and temperature over time. Step 5: State four other steps to be followed in constructing a polygraph (apart from choosing and labeling vertical scales). i. Draw and label the horizontal axis (x-axis) for months. ii. Plot the rainfall data as bars for each month. iii. Plot the temperature data as points for each month and join them with a line. iv. Give the graph a clear and descriptive title. Step 6: Give one disadvantage of this type of graph. • It can be complex and difficult to read if too much data is presented or if the scales are not chosen carefully, potentially leading to misinterpretation. Got more? Send 'em.