A2 Sequences and Linear Graphs

Question 1

How do you find the gradient of a line?

Answer 1

Gradient = rise / run

Question 2

How are perpendicular lines related in terms of their gradient?

Answer 2

If line a (positive line) has a gradient of m, the line perpendicular to it (negative line) has the gradient -1 / m (negative reciprocal).

Question 3

How do you get the midpoint between two points?

Answer 3

(x1 + x2) /2 , (y1 + y2) / 2