1 Do XXXXXXXXXXThe Distance Learning Centre Module GCSE Equivalence in Maths Unit 5 Student Assessment QUESTION 3 A) From the graph below, work out the equation for each straight line. B) Draw your...

Sol: 3 (A) (a) from the graph, see the (i) line, the intercept on -y axis is -3.
That is 3c  
We know that equation of straight line is:
y mx c  ……………. (1),
Slope
changein y 2
2
change in x 1
m   
Now put the values of m and c in equation (1), so the equation of first line

2( ) ( 3)
2 3
y x
y x
  
 

So the equation of (i) line 2 3y x 
(b) From the graph, see the (ii) line, this line passes through the origin. So the
intercept on -y axis is zero.
That is 0c 
We know that equation of line is:
y mx c  ……………… (1),
Where slope
changein y...