Linear Equations

Question 1

What is the gradient formula?

Answer 1

m = y_2 - y_1/x_2-x_1

Question 2

What is the equation of a linear graph?

Answer 2

y = mx + b

Question 3

How do you find the intercepts?

Answer 3

You substitute the other value with a 0

Question 4

What does the formula x = a; y = a mean?

Answer 4

The line is going through only one axis?

Question 5

What makes a line parallel to the original line?

Answer 5

It holds the same gradient

Question 6

How do you find the perpendicular line?

Answer 6

You find the inverse of the gradient and change its power

Question 7

How do you work out linear inequality?

Answer 7

Same as an algebraic equation but when multiplying or dividing a negative the inequality changes direction

Question 8

What are two ways of doing simultaneous equations?

Answer 8

(a) Substation of the pro numerals

(b) Elimination by subtraction

Question 9

What happens to the gradient when the line is steeper?

Answer 9

The gradient’s magnitude increases