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dlangley 4/10

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review of graphs

graph application

teacher notes

click on your choice

The menu for your barbecue has been decided: burgers and wings!

you plan to spend no more than $24 for the meat. The local store sells Burger for $3.00 per pound and wings for $2.40 per pound.

write an inequality to model the purchase choices

burger is $3/ lb wings $2.40/lb

you want to spend no more than $24

b = number pounds burgerw = number pounds wings

3b + 2.4w < 24 graph your inequality:

write an inequality to show the solutions

erase below for answer:

burger and wing purchase

burger (pounds)

wings (pounds)

1 2 3 4 5 6 7 8 9 10

1

2

3

4

5

6

7

8

9

10

3b + 2.4w < 24

shade thehalf plane

dashed or solid line?

touch the spatula then

touch either the

x-intercept or y-intercept

back

burger and wing purchase

burger (pounds)

wings (pounds)

1 2 3 4 5 6 7 8 9 10

1

2

3

4

5

6

7

8

9

10

3b + 2.4w < 24

next

click on my spatula, thenclick on the half-plane youthink should be shaded tomake the inequality correct.

burger and wing purchase

burger (pounds)

wings (pounds)

1 2 3 4 5 6 7 8 9 10

1

2

3

4

5

6

7

8

9

10

3b + 2.4w < 24 questions

·can you buy 6 lbs of burger and 4 lbs wings if you want to stay within your set budget?

·how many pounds of wings can you buy if you decide not to buy any burger?

·if you buy 3 lbs of burger, what is the most whole pounds of wings you can buy?

to the graph

to Menu

Inequalities on a plane·review of graphs

>

y > x y > -x

graph the inequality on your paper, then slide the arrow to check

slide

next

at most

no more than

at least

no less than

less than or equal to

greater than or equal to

< >

drag the key word to the matching inequality columnincorrect answers will "disappear"

next

Match the inequality to the graphnote: > is written as >= < is < = next

touch the graph that correctly shows: y < -3x + 4

next

touch the graph that correctly shows: y > 4 x - 6 3

Information:

Lesson objectives Teachers' notes

1) review writing an inequality

2) review of graphing inequalities on coordinate plane

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Teachers' notesLesson objectives

Subject:

Topic:

Grade(s):

Prior knowledge:

Math

review inequalities on plane

7,8, Pre Algebra, Algebra

know how to write and graph inequalities on coordinate plane

Lesson notes:

when needed, directions are given on the page

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