TwMM 3.1 Rectangles with Fixed Area.pptx
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Transcript TwMM 3.1 Rectangles with Fixed Area.pptx
Math CC7/8 – Be Prepared
On Desk:
Learning Log:
1. Pencil
2. Calculator
3. Math Journal
4. TwMM Learning Log
1. HW: p. 69, #1-2, 13, 15-21, 39
2. Parent Signatures?
3. Partner Quiz – Absent?
Tasks for Today
• Warm Up – write an equation
• Lesson 3.1 – inverse variation
Warm Up
Find the equation of the line that
passes through the given points.
(1, 8) and (-3, 4)
y=x+7
Labsheet 3.1
As length increases, width decreases.
The graph also decreases at a decreasing rate, so it is curved.
The relationship is NOT linear!
24
w=l
or
lw = 24
or
24
l= w
32
w =l
or
lw = 32
or
l=
32
w
Write the widths as
decimals to the nearest
hundredth.
A
w l
Both functions can be written in the form of
=
where A is a fixed number.
The graphs are both decreasing curves.
The tables have patterns of w (or l) values that decrease rapidly
at first and then more gradually.
21, 780
Roseville’s lots could be in the form of
=
w
l
As length increases, the width decreases rapidly at
first but then more slowly, never actually getting to 0.