00:01
Okay, so it's because consider the line whose equation is y equals 2x minus 3.
00:06
What would it look like if we translated it four units left? so that's going to be, oops, hold on, y equals two left.
00:19
So x left is negative, so plus four minus three and then five plus five up.
00:30
So that's going to be y equals 2x plus 8 minus 3 plus 5.
00:46
So y equals 2x plus 10.
00:52
So i'm going to go back and i'm going to graph this function first.
00:55
So i'm going to graph this one in blue.
00:59
So 1, 2, 3, up 2 over 1, up 2 over 1, up 2 over 1, up 2 over 1, up 2 over 1, up 2 over 1, up 2 over 1.
01:23
So there's this graph, the line.
01:27
So now i want to move it four units left.
01:34
So from here i'm going to go four units left.
01:36
One, two, three, four.
01:39
And then up five.
01:42
So one, two, three, four, five.
01:50
My slope is still going to be up two over one...