# Geometry Coordinate – Equation of Lines

**Question**

Solve the following equation of lines questions.

- If the y-intercept is 9 while the gradient is 10, state the equation of the line.
- A straight line pass through the origin. If the gradient is 2, what is the equation of the line?
- Form the equation of the line for two points (1,1) and (2,5) that fall within the line.

**Answer**

- y = 10x + 9
- y = 2x
- y = 4x – 3

*Note: *

*y = mx + c**Where, m refers to the gradient, while c is the y-intercept.*

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