Maths Dictionary · SS 1
Variation
Simple meaning
How one quantity changes when another changes: directly (both go up) or inversely (one up, one down).
Example
y = 3x (direct); y = 12x (inverse).
See it
From the Direct and Inverse Variation lesson. Try moving things around.
Gradient
2
rise ÷ run = 4 ÷ 2
Distance AB
2√5
≈ 4.47
Midpoint M
(1, 2)
average of A and B
Drag A and B (or focus one and use the arrow keys).