Question 836703
The equation is
(y=2x+4)
(y=-x+7)

They are lines and must be represented graphically.

For line one y=2x+4 and line two y=-x+7

For line 1 , intercept on x and y axis;
When y=0 it implies 0=2x+4
                                     x=-2, hence (-2,0)
                                     y=2(0)+4, (0,4)

For line 2, intercept on x and y axis;
When y=0 it implies 0=-x+7
                                     x=7, hence (7,0)
When x=0 it implies y=-(0)+7, (0,7)

So the points on line 1 and 2 are 
(-2,0) ,(0,4) and (7,0) , (0,7).

Now use these points to draw the graph whiles you've shown all the workings involved.