1. what does it mean to say that a country’s land area is positively correlated with its population? a. the larger the land area of a country, the higher its population tends to be. b. the smaller the land area of a country, the higher its population tends to be. c. there is no relationship between a country’s land area and its population. d. a larger land area automatically means a higher population. 2. what is an outlier? a. a data point that perfectly embodies the relationship between two variables b. a data point that falls outside of a general trend on a graph c. a way of determining how two variables are related to each other d. a data point that does not fit into a bar graph 3. what is a trend line on a scatter plot? a. a visual representation of the relationship between two variables b. a line connecting only the highest and lowest values on a graph c. a line connecting all of the data points on a scatter plot d. any line of data on a graph

What is the digital revolution and how did it change society? what are the benefits of digital media?

Jake really works well with numbers and is skilled with computers but doesn't work well with others. which of the jobs discussed in this unit might be best for jake? why?

When making changes to optimize part of a processor, it is often the case that speeding up one type of instruction comes at the cost of slowing down something else. for example, if we put in a complicated fast floating-point unit, that takes space, and something might have to be moved farther away from the middle to accommodate it, adding an extra cycle in delay to reach that unit. the basic amdahl's law equation does not take into account this trade-off. a. if the new fast floating-point unit speeds up floating-point operations by, on average, 2ă—, and floating-point operations take 20% of the original program's execution time, what is the overall speedup (ignoring the penalty to any other instructions)? b. now assume that speeding up the floating-point unit slowed down data cache accesses, resulting in a 1.5ă— slowdown (or 2/3 speedup). data cache accesses consume 10% of the execution time. what is the overall speedup now? c. after implementing the new floating-point operations, what percentage of execution time is spent on floating-point operations? what percentage is spent on data cache accesses?