Select the co-ordinate that satisfies the following straight-line equation:    

What is the equation of a horizontal line through ?

What is the gradient and the y-intercept for a straight line with the equation ?

Two lines are said to be parallel if the difference of their slopes is _______.

In a straight line with the equation , if ,  then slope is ________.

If a vertical and horizontal number lines intersect each other, they form a right angle (an angle of 90 degrees), and a (x;y)  co-ordinate system of axes is formed. The point at which the two axes intersect (cross each other) is called the _______.

The formula for gravitational force, , is given by: . Make the subject of the formula. 

Simplify the expression as far as possible:

Evaluate the value of the expression if    and .

Solve for in the following equation: