Question 2

The picture shows five points V, U, T, S and P. Which are the 2 points when connected together with a line, will satisfy the linear equation of y = x + 1? 

Select and check your answer...

A. S and V
B. V and T
C. P and S 
D. P and U

One way to solve question is to draw the graph of y = x + 1 on a piece of graph paper.

To draw the line, we need at least two points. So, let's draw a table to store the  coordinates of two points.
 

Now, fill in the x-coordinates. We can pick any numbers. To make things easier, let's pick 0 and 1.

These x-coordinates will be used to calculate the y-coordinates later. 
 

Now calculate the x-coordinate of the first point by substituting x = 0 into y = x + 1:
      y  = 0 + 1
          = 1

For x=1, substituting x = 1 into y = x + 1:
        y = 1 + 1
           = 2

Fill in the table with these newly calculated y-coordinates.

Now plot these points onto the plane and connect them with a line as shown in the picture.