Jfnd Skd Flashcards
Rate
Comparison of two numbers: one divided by the other.
Gradient
Measure of steepness: change in y divided by change in x.
y-intercept
Point at which a graph intersects the y-axis.
Equation of a line
y = mx + c
Currency
Type of money.
Speed
Speed = Distance / Time
Velocity
Velocity = Displacement / Time
Distance
Measure of how far something has travelled.
Displacement
Measure of how far away something is from its starting point.
Acceleration
Acceleration = Change in speed / Time
What is a scale factor?
Multiplier between relative parts of equivalent ratios.
What is a constant of proportionality?
Multiplier between parts of the same ratio.
What is a proportion?
Relationship showing how quantities are related to each other.
What is direct proportion?
As one amount increases, the other increases by the same rate.
What is inverse proportion?
As one amount increases, the other decreases by the same rate.
What is a term?
A term.
What is a ratio?
Comparison of values.
What is substitution?
Replacing a mathematical expression with another.
What is a percentage?
Measure of a quantity out of 100.
What is a fraction?
Used to represent a number divided into equal parts.
What does equivalent mean?
Equal in value or meaning.
What is a factor?
Number that divides a given number exactly.
What is a common factor?
Factor that is shared by both given numbers.
What is a multiple of…?
In the times table of…
What is a fraction in simplest form?
Fraction that has no reduced equivalent.
What is a ratio in simplest form?
Ratio that has no reduced equivalent.
What is data?
Collection of facts, words or numbers.
What does univariate mean?
Of one variable.
What is a bar chart?
Method of showing data distribution with category on one axis and frequency on the other.
What is a line graph?
Graph connecting individual data points - usually quantity over time.
What is a pictogram?
Chart using symbols to represent data.
What is the average?
Typical value from a data set.
What is the mean?
Type of average: Total frequency divided by number of values.
What is the median?
Type of average: The middle value.
What is the mode?
Type of average: The most common value.
What is the range?
Measure of spread: Difference between greatest and smallest.
What is the purpose of comparing data?
To examine how one set of data differs from another.
What is a pie chart?
Graph made of a circle divided into sectors.
What is a questionnaire?
A set of questions or prompts to collect data from people.
What is statistics?
Branch of applied mathematics concerned with collecting, utilising and displaying data.
What is a tally?
Quick, simple method to keep track of frequency.
What is bivariate data?
Data with two variables.
What is a scatter graph?
Representation of bivariate data with each data point plotted individually.
What is a line of best fit?
Straight line showing the ‘trend’ of scatter graph - passing through the middle of the points.
What is an outlier/anomaly?
Value in a dataset that is very different from the other values.
What is sample size?
Number of pieces of data collected.
What is grouped data?
Continuous data grouped within a class.
What is a class interval?
Difference between the upper and lower limit of a group of data.
What is a class midpoint?
Halfway between upper and lower limits of a group of data.
What is a stem and leaf diagram?
Method of organising data based on place value of numbers.
What is cumulative frequency?
Running total of frequencies.
