1. Equations of straight lines
The straight Lines
Equations of straight lines

2. Graph the line that has slope 2 and y-intercept = 3.

3. Graph the line passing through x-intercept at ─2 and has a slope -¾y x -2

4. Equation of a straight line
y = mx + c
m = slope of the line
c = y-intercept
Example:
The equation of a line that has
gradient 3 and passes through (0,5)
is y = 3x + 5.

5. Write down the equation of straight line given
Gradient ─3 and y-intercept 2.
Gradient ─2 and y-intercept 5
Answer:
y = ─ 3x + 2
y = ─ 2x + 5

6. Sketch the lines given the equation.
y = - 3x+ 4
When x = 0, y = 4
When x = 1, y = -3(1) + 4
= 1
The line passes through (0,4)
And (1,1)
(0, 4)
(1, 1)