Straight Lines

Which diagram is linear function?

• Diagram 1

• Diagram 2

• Diagram 3

• Diagram 4

Which equation is general term of STRAIGHT LINE？

•  $ax+by=c$  

•  $y=mx+c$  

•  $\frac{x}{a}+\frac{y}{b}=1$  

 $y=mx+c$  
What is m and c?

• m is the gradient, c is the y-intercept

• m is the gradient, c is the coordinate-y

The graph of function y = h

is parallel to____________

• x-axis

• y-axis

 $y=2x+9$ 
Determine the gradient of the straight line.

• 2

• 9

 $y=-x+4$  
Determine the gradient of the straight line.

• 1

•  $-1$  

• 4

 $y=2x-7$  
Determine the y-intercept of the straight line.

• 2

• 7

•  $-7$  

 $y=2x+6$  
Determine the y-intercept of the straight line.

• 2

• 6

What is the value of h?

• 0

• 4

• 8

 $2y=8x+6$  
Determine the gradient of straight line.

• 2

• 4

• 6

• 8