WGU C957 (Applied Algebra) Complete Exam Study Questions with Correct Answers

WGU C957 (Applied Algebra) Complete Exam Study Questions with Correct Answers 1. Which choice is a variable? A. The number of states in the United States of America B. The cost of your daily newspaper C. The amount a teenager makes babysitting D. Your shoe size - ANSWER C 2. Asymptote - ANSWER a horizontal, vertical, or slanted line that a graph approaches but never touches 3. coefficient of determination - ANSWER A statistic that measures how well a regression prediction approximates the real data points. An r^2 of 1 indicates that the regression prediction is a perfect fit for the data 4. common ratio - ANSWER The number by which each term in a sequence is multiplied to find the next number in the sequence; for example 4 is the common ratio for the sequence [1, 4, 16, 64, 256...] 5. X axis lists: - ANSWER Independent variable/ input 6. Y axis lists: - ANSWER Dependent variable/output 7. Concave up - ANSWER U shaped/ decreases slower and slower then increases faster and faster 8. Concave down - ANSWER upside down U/ increases slower and slower and deacreases faster and faster 9. Validity of scatter plot - ANSWER Invalid if less than 10 points ion notation - ANSWER a way to name a function that is defined by an equation 11.Global Maximum - ANSWER Finds the highest y-number the function goes to 12.Moore's Law - ANSWER the observation that computing power roughly doubles every two years. 13.Multivariate - ANSWER involving more than two variables 14.Which variable is related to the variable temperature? A. Pen sales B. Computer sales C. Hot chocolate sales D. Book sales - ANSWER C 15.The number of years someone regularly deposits money in a savings account is related to the amount of money in the account. T/F - ANSWER T ential function - ANSWER increasing concave up forever or decreasing concave forever; the concavity never changes tic function - ANSWER modeled by an S curve and a center inflection point; increases faster and faster for the first half of the function and second half will trend downwards; will only change concavity once omial function - ANSWER will always change direction to rising to falling and vice versa; the degree of the function depends on the number of turns the data takes 19.Polynomial function notation - ANSWER P(x)= -2x^2+3x+7 20.Exponential function notation - ANSWER E(x)=2e^-0.7x 21.Logistic function notation - ANSWER T(x)= 1000/1+4e^-0.2x 22.Average rate of change formula - ANSWER y2-y1/x2-x1 23.Rate of change for linear functions - ANSWER y=mx+b; average and instant rate of change are equal to the slope of the line vity - ANSWER measures how quickly the instantaneous rate of change of a function is changing ve up - ANSWER decreasing slower and slower increasing faster and faster ve down - ANSWER increasing slower and slower decreasing faster and faster ction point - ANSWER a point on a graph where the concavity changes from up to down or vice versa sample size - ANSWER 10 data points or more 29.Validity - ANSWER use the SOME-V mnemonic to determine if the sample is valid or not and use common sense as well r function - ANSWER will always form a straight line; concavity will never change; degree of 1 31.What does a linear function model? - ANSWER a constant rate of change 32.What does a polynomial function model? - ANSWER acceleration/deceleration 33.What does an exponential function model? - ANSWER A constant ratio change AND all percentage based growth 34.What does a logistic function model? - ANSWER bounded growth and decline 35.What is an example of a logistic function model subject? - ANSWER Populations