Sorry that i posted at this late hour..... Just came back from YOG....

1) If (a,b) lies at y=mx+c, then b=m(a)+c

2) Gradient is = rise divided by run = change in y coordinate divided by change in the x coordinate.

THE ORDER IS IMPORTANT

3) y - 1x +c (Coordinates 1,5 and -3,1)

To find c, you have to find x. It can go two ways;

Either you substitute the coordinates (1,5) and get

5=1(1)+c

=1+c

c = 4#

OR

1 = 1(-3)+c

= -3+c

.: c = 4

4) To satisfy an equation means to balance both sides of an equation.

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