Math Stuff Exam Questions 2024.
Which complex number has a distance of Which complex number has a dist from the origin on the complex plane?
ance of mc026-1.jpg from the origin on the ?complex plane - ANSWER Which function has an inverse that is a function? - ANSWER Not A. b(x) = x2 + 3
If f(x) and f-1(x) are inverse functions of each other and f(x)=2x+5, what is f-1(8)? - ANSWER B. 3/2
Which statement could be used to explain why the function h(x) = x3 has an inverse relation that is also a function? - ANSWER Not C
Which function has an inverse that is also a function? - ANSWER C. {(-1, 3), (0, 4), (1, 14), (5, 6), (7, 2)}
If f(x) = 3x and g(x)=1/3x which expression could be used to verify that g(x) is the inverse of f(x)? - ANSWER Not A. or B.
The function h(x) is given below.
h(x) = {(3, -5), (5, -7), (6, -9), (10, -12), (12, -16)}
Which of the following gives h-1(x)? - ANSWER B. {(-5, 3), (-7, 5), (-9, 6), (-12, 10), (-16, 12)}
If f(x) and its inverse function, f-1(x), are both plotted on the same coordinate plane, what is their point of intersection? - ANSWER D. (3, 3)
Which graph shows a function whose inverse is also a function? - ANSWER C. f1(x) If f(x)=5x-25 and g(x)=1/5x+5, which expression could be used to verify g(x) is the inverse of f(x)? - ANSWER B
Which statement could be used to explain why f(x) = 2x - 3 has an inverse relation that is a function? - ANSWER B. f(x) is a one-to-one function.
Which graph shows a function whose inverse is also a function? two of them - ANSWER A. f1(x) and f(x)
Which function is the inverse of f(x) = 2x + 3? - ANSWER Not C
If f(x) = 5x, what is f-1(x)? - ANSWER Not B
Which function has an inverse that is also a function? - ANSWER C. {(-1, 3), (0, 4), (1, 14), (5, 6), (7, 2)}
If f(x) and f-1(x) are inverse functions of each other and f(x)=2x+5, what is f-1(8)? - ANSWER Not C
Which function has an inverse that is also a function? - ANSWER Not D {(-4, 4), (-2, -1), (-1, 0), (4, 1), (11, 1)}
For which data set is a linear regression most reasonable? - ANSWER C.a set of four data pairs with a correlation coefficient r = -0.8
The line of best fit for the scatterplot below passes through which pair of points? - ANSWER C. R and Q
s and t by self
The table below shows the lengths and weights of six dolphins at an aquarium. Use the data from Pax and Snowflake to create a linear model that predicts the weight (y) of a dolphin given its length (x). Which dolphin's weight differs most from the value predicted by this model? - ANSWER B. Jojo
A sociologist recorded the estimated life expectancies of women born in Center City. Use the data from women born in 1970 and 2000 to create a linear model that predicts the life expectancy, in years, (y) of a female born in a given year (x). - ANSWER A. y = 0.213x - 352.0 The line of best fit for the scatterplot below passes through which pair of points? - ANSWER D s and q little r by itselg
Marta believes that the equation of the line of best fit for the scatterplot below is mc026-1.jpg. Which statement best summarizes why Marta is likely incorrect? - ANSWER A. Marta's equation has a positive y-intercept, but the scatterplot suggests a negative y-intercept.
Irina plotted the number of participants in a summer camp program on a coordinate plane to create the following scatterplot. Which graph shows the line of best fit for this scatterplot? - ANSWER Not D
For several years, Graham has gathered data on students who own a computer and on their performance on a typing-speed test. He creates the linear model y = 3.8x + 17.4 where y represents the typing speed, in words per minute, of a student and x represents the number of years the student has owned a computer. According to Graham's model, what is the approximate speed of a student who has owned a computer for three years? - ANSWER B, 29 words/min
The scatterplot shows the number of athletes on the field hockey and tennis teams at Southern High School during seven different years. Which statement is best supported by the line of best fit? - ANSWER
C. When there are 10 field hockey players, there will be about 35 tennis players.
The school's guidance department compares the grade-point averages and standardized state test scores for 10 students in each grade. The table below shows the correlation coefficient for each data set.
- ANSWER Not C. 10th and 12th
Poloma believes that the equation of the line of best fit for the following scatterplot is mc024-1.jpg. Which statement best summarizes why she must be wrong? - ANSWER Not D
The scatterplot shows the number of home runs Mario hits during his first four seasons on the company softball team. If his output continues to follow the linear model, approximately how many home runs will Mario hit during his ninth season? - ANSWER B. 35 home runs
For which data set is a linear regression most reasonable? - ANSWER C. a set of four data pairs with a correlation coefficient r = -0.8
