00:01
Hello, i have a question.
00:02
In this i need to find express the function as a piecewise function.
00:07
Okay, so if you look at the graph, it looks like two straight lines, two straight lines, and one, which is like this, passes through the point minus one comma minus one and second point i will be taking as minus two comma minus four.
00:30
So equation of the straight line passing through two points, y minus y1, equal to y2 minus y1 by x2 minus x1 into x minus x1.
00:46
So that would be y minus minus 1, that is 1 equal to y2 minus y 1 by x2 minus x1 into x minus x1.
01:01
So y plus 1 will be equal to minus 3 by minus 1 x plus 1.
01:10
So y will be equal to this is 3x plus 3 minus 1 which is 3x plus 2.
01:18
So this is the value of fx which is 3x plus 2.
01:25
And this is for minus infinity to minus 1.
01:34
I will be just writing it afterwards...