Mathematics for IGCSE & O level - Coordinate Geometry (Section 4 - No. 31)
What information is needed to determine the equation of a straight line?
Only the y-intercept
The gradient and a point on the line
Only a point on the line
Two points on the line
คำอธิบาย
Using y = mx + c, you need m (the gradient) and any point on the line.