The temperature of a cooling liquid over time can be modeled by the exponential function t(x) = 60(1/2)^(x/30) + 20, where t(x) is the temperature in degrees celsius, and x is the elapsed time in minutes. graph the function and determine how long it takes for the temperature to reach 28°c. what was the initial temperature?

Use a calculator to verify that σ(x) = 62, σ(x2) = 1034, σ(y) = 644, σ(y2) = 93,438, and σ(x y) = 9,622. compute r. (enter a number. round your answer to three decimal places.) as x increases from 3 to 22 months, does the value of r imply that y should tend to increase or decrease? explain your answer. given our value of r, y should tend to increase as x increases. given our value of r, we can not draw any conclusions for the behavior of y as x increases. given our value of r, y should tend to remain constant as x increases. given our value of r, y should tend to decrease as x increases.