Posted by **Modulus Function** on Saturday, March 30, 2013 at 11:01am.

Sketch y=|(x-1)(x-3)| and y=|x^2-4x| .

I don't know how to sketch the graphs :(

- math -
**Reiny**, Saturday, March 30, 2013 at 11:32am
in your previous post I showed you how to graph the absolute value of linear function.

The same concept is true for the above quadratics

for y=|(x-1)(x-3)|

You will have two parabolas, one is

y = (x-1)(x-3) the other is y = -(x-1)(x-3)

one will open up , the other will open down

They both have the same x-intercepts of 1 and 3

So sketch both of them, then erase the part of both of them that lies below the x-axis.

Do the same for the second equation.

They will have similar shapes, except the second has x-intercepts of 2 and -2

- math -
**Anonymous**, Saturday, March 30, 2013 at 11:50am
i still don't really understand. How can i sketch y=(x-1)(x-3) and y=-(x-1)(x-3) ? what is the coordinate?

## Answer this Question

## Related Questions

- math sketch - how do you sketch these graphs: k is a positve constant: y=(x+k)(x...
- chemistry 12 - hey i was wondering, i have this question: Sketch a pH curve for ...
- math - Sketch the graphs of f(x) = x^2 and g(x) = 2x. Find a number a between 0 ...
- statistics - How do I sketch distributions? I think I'm doing it wrong. Is there...
- math - what does this question mean : Sketch a graph to show four graphs in each...
- calc - i need to sketch a graph that satisfies all of these conditions: - it is ...
- maths - sketch on a diagram the graphs of 1)y=x^2 2)y=(x+a)^2 3)y=b(x+a)^2 4)y=b...
- Maths trig - Sketch the graphs of f(x)=3overx+1 and g(x)=-2x-4
- Physics Help Please!!!! Graphs Please Please!!! - ------A part is on an assembly...
- pltw - What is a technical sketch? What is an artistic sketch? How are the two ...

More Related Questions