Ratio & Proportion
Simplify 4:8
Interior angles add up to...
180°
Is the population of a country numerical or categorical data?
Numerical
In a grid, the horizontal line is called the...
X-axis
If a=3, what does 2a + 1 =
2(3) + 1 = 7
Simplify 12:40
3:10
Describe alternate angles
One of a pair of angles on opposite sides of a line intersecting two other lines and between the two intersected lines
Is a measurement continuous or discrete data?
Continuous
Which quadrant has a negative X-axis and a positive Y-axis?
Quadrant 2
7(x+2) =
7x + 14
Divide €900 between A,B,C in the ratio 1:2:3
A =€150
B = €300
C = €450
Describe corresponding angles
The angles which occupy the same relative position at each intersection where a straight line crosses two others
What is simple random sampling?
When a researcher randomly selects a subset of participants from a population
Point (0,0) is called the...
Origin
a2xa2=
a4
50 apples cost €25. How much would 75 apples cost?
€37.50
A reflex angle is _____ than 90°
Greater/Bigger
Are eye colours numerical or categorical data?
Categorical
Find the midpoint between (-3,4) and (1,2)
(-1,3)
(x+4)(x+2)
x2+6x+8
What does "inverse proportion" mean?
When one value increases another value decreases. i.e. In a car as speed increases the time spent travelling decreases.
What are collinear points?
Points on the same line
Are exam grades nominal or ordinal data?
Ordinal
Find the slope between (1,2) and (3,4)
slope = 1
Solve: 3x - 4 = 8
x = 4