Math business and social science exam quiz – answered.
What does f(x) mean or stand for in the function f(x)= 5x-3? - > It means or stand for y.
How do you determine when a graph is a function (or specifies a function)? - > Use a
vertical line test, if you draw a vertical line through the graph and only cross at one point of
the graph each time then it is function.
What are the two main areas that create domain restriction with a function? - > -you cannot
have an overall value that is negative under a square root
-you cannot have an overall value zero in a denominator of a function.
What is the slope of the line in the function y=-4x+3? - > the slope is -4
What is the equation of the vertical line through the point (-6,7)? - > x=-6
What is the equation of the horizontal line through the point (-6,7) - > y=7
When you are finding the domain of a function in the real world, give an example where the
real world might limit what you find compared to the normal domain of a function? - > in the
real world, negative values of x would not make sense. Answer will vary but to talk about a
function that would normally allow for negative values of X.
Describe in words what is meant by the term slope and give an example of the use of slope
in the real world? - > Slope being a rate of change of one variable as another one is also
changing and then give an example.
How would you calculate the total amount of interest that you would pay on a car loan? - >
Multiply amount of car payment by the number of payments and subtract the initial cost of
the car.
How do you transpose a matrix? - > Take each row and write elements down in a column
what does the notation a23 represent? - > Elements of row 2, column 3 of Matrix A.
What does f(x) mean or stand for in the function f(x)= 5x-3? - > It means or stand for y.
How do you determine when a graph is a function (or specifies a function)? - > Use a
vertical line test, if you draw a vertical line through the graph and only cross at one point of
the graph each time then it is function.
What are the two main areas that create domain restriction with a function? - > -you cannot
have an overall value that is negative under a square root
-you cannot have an overall value zero in a denominator of a function.
What is the slope of the line in the function y=-4x+3? - > the slope is -4
What is the equation of the vertical line through the point (-6,7)? - > x=-6
What is the equation of the horizontal line through the point (-6,7) - > y=7
When you are finding the domain of a function in the real world, give an example where the
real world might limit what you find compared to the normal domain of a function? - > in the
real world, negative values of x would not make sense. Answer will vary but to talk about a
function that would normally allow for negative values of X.
Describe in words what is meant by the term slope and give an example of the use of slope
in the real world? - > Slope being a rate of change of one variable as another one is also
changing and then give an example.
How would you calculate the total amount of interest that you would pay on a car loan? - >
Multiply amount of car payment by the number of payments and subtract the initial cost of
the car.
How do you transpose a matrix? - > Take each row and write elements down in a column
what does the notation a23 represent? - > Elements of row 2, column 3 of Matrix A.
