I think its the bottom left, i'm not completely sure though.
Only 19 is a function because a function only has one y value for every x value. For the other graphs, there are at least two y values for each x value.
...-1,8......................................
<em><u>Explore Motors dealership has R7 million to spend and wants to buy equal numbers of the entry.</u></em>
Plug it in.
y = -1, y1 = 1
x = 3, x1 = 1
-1 - 1 = m( 3 - 1)
-2 = 2m
m = -1
The slope is -1
y = -x +b
-1 = -3 +b
b = 2
The equation is y = -x + 2
Hope this helps.
