Math 20 Applied Questions | Math 20 Applied Answers |
The y coordinate of the x intercept is | 0 |
The x coordinate of the y intercept is | 0 |
y = mx + b is a | linear function |
slope equals | m |
y intercept equals | b |
the standard form of an equations is set to equal | 0 |
there are no ------- only whole numbers | fractions |
the coefficient of the x term must be | positive |
the coefficient of other terms can be | positive or negative |
to get rid of fractions you must | multiply by the denominator |
to solve for x | make y zero |
to solve for y | make x zero |
Linear Equation | any equation that has a degree of one and when graphed on a coordinate grid becomes a line |
adding or subtracting the equations of a linear system | doesn't change the solution |
sometimes to eliminate a variable you must | multiply be a constant |
< means | less than |
> means | greater than |
< with a line underneath means | less than or equal to |
> with a line underneath means | greater than or equal to |
inequalities with only one variable can still be shown on a grid, but they will be | horizontal or vertical |
y > means you | shade above the dotted line |
y < means you | shade below the dotted line |
y > or equal to means you | shade above the solid line |
y < or equal to means you | shade below the solid line |
a system of inequalities | can consist of two or more inequalities and the solution is the region where the corosponding half-plane is the intersect or overlap |
normal shading | solution area is darkest |
reverse shading | solution ares is lightest |
in y=mx+b, m is the | slope |
in y=mx+b, b is the | y intercept |
the x intercept is where | the line crosses the x axis |
the y intercept is where | the line crosses the y axis |
a linear system | a set of two or more linear functions where the value of both x and y satisfy the two or more functions |
the solution to a system of equations is | the point(s) of intersection |
when you graph both equations the solution is | the point(s) of intersection |
steps to solving problems with inequalities | 1. assign the variables, 2. note the implicite constraints, 3. write the inequalities and 4. qraph to solve |
Raw Data | statistical information as it is collected and before it has been grouped in any way |
Tabulated Data | statistical information that has been organized and ajusted in tabular form |
Histogram | a graph where equal intervals are given io the x-axis or the y-axis and indicated by rectangles that are together and on these intervals |
Frequency Polygon | line graph produced by joining the midpoints of the tops of the columns of a histogram |
Ogive | a graph of cumulative frequency distribution and has the shape of an elongated "s" |
Population Pyramid | two back to back, horizontal histograms with a common vertical axis, used to interpret how people of various ages live |
Multiple Line Graph | two or more line graphs used to compare one comodity with another |
Stacked Bar Graph | bar graph with two or more stacks used to compare data |
Circle Graph / Pie Chart | circular graph used to chow tho relation of one part to another and to the part as a whole |
Graphs compare... | relationships between sets of quantities |
Why do we display data in bar graphs? | so that a large amount of data can be displayed in a short time period |
what do bar graphs compare? | two at more things that are simmilar |
What is the difference between a histogram and a bar graph? | a histogram has no spaces between the bars but a bar graph has spaces |
in a line graph, why are the points connected? | to show trends in the data |
ina line graph only the points are ____________ | actual values |
Time related graphs | their quantities depend on time |
Interpolation | estimation of a value between two points on the graph |
Extrapolation | estimation of a value beyond tho plottred points on the graph |
Discrete Data | can be counted using whole #'s. produces a graph with points not joined |
Continuous Data | allows for comtinuous cange such as volume or speed. produces graphs joined together |
salary | a fixed amount of money earned over a specific period of time |
wage | money earned daily or hourly |
commission | earnings based on a percent of an employee's salary durring the pay period |
graduated commision | earnings based on commission; increases or decreases when sales reach a certain level |
piecework | earnings bassed on the number of items produced |
bi-weekly | once every two weeks - 26 times per year |
semi-monthly | twice each month - 24 times per year |
weekly | 52 times per year |
monthly | 12 times per year |
annually | once par year |