y = mx + b
POI by Graph
POI by EVM
Write the Rules
Random
100

y - x = 3

y = _____

y = x + 3
     -or-
y = 3 + x

100

x + y = -3

y = x + 3

POI (_ , _)

Graph &

POI (-3,0)

100

y = x 

y = 2x - 4

POI (_ , _)

POI (4, 4)

100

You're going to a special farmers market. It is $10 for a basket and $5 per pound for anything that goes into that basket.

How would you describe the cost of buying things at this market as a rule?

y = 10 + 5x 

   -or-

y = 5x + 10

100

What is the average annual rainfall measured at SFO?

Closest without going over gets the points!

8.91 inches of rain per year

200

2y = 4x + 12

y = _____

y = 2x + 6

200

y = 2x

y = x + 1

POI (_ , _)

Graph &

POI (1, 2)

200

y = x + 3

y = -2x - 3

POI (_ , _)

POI (-2, 1)

200

Draw a smiley face. 

The first two teams to raise their board get points.

200

What is the population of Mill Valley?

Answers within 1,000 above and below get points.

14, 185

(13,185 through 15,185 get points)

300

3y + x = 7x + 9

y = _____

y = 2x + 3

300

First two students to (silently) stand up earn points for their team!

Don't forget, other classes are in session... please keep the noise down!

300

y - 4x = 8

y = 2(2x + 4)

POI (_ , _)

INFINITE SOLUTIONS!

The lines are "colinear"
(fancy math way of saying the same)

300

A bunny weighs 5 pounds and gains 3 pounds per year. 

A cat weighs 19 pounds and gains 1 pound per year.

Write rules for the bunny and the cat.

Bunny = 5 + 3x

Cat = 19 + x

300

Is there rain predicted for this weekend?

NO!

Get out there and enjoy the weekend!

400

3x + 7 = x - 2y -1

y = _____

y = -x -4

400

y = -2x

x = 0

POI (_ , _)

Graph &

POI (0, 0)

400

3(y - x) -2 = 4 + 6x

y = x - 3

POI (_ , _)

POI (-5/2 , -11/2)

   -or-

POI (-2 1/2 , -5 1/2)

400

There were 18 students in math class at the beginning of the year, and 1 student was added each month.

There were 30 students in history class at the beginning of the year, and 2 students left each month.

Which do you like better, history or math?

Math? History? POINTS??

FYI - they both have 22 students after 4 months & it pays off to read the full directions before starting a problem!

400

What is the oldest trail race in America?

The Dipsea Trail Race was started in 1905

500

Write down all team members favorite colors

Which color is the most popular?

500

y = 1/4 x

x + 4y = 8

POI (_ , _)

Graph &

POI (4, 1)

500

y = 1/4x

4y - x = 8

POI (_ , _)

NO SOLUTION

They are parallel lines.

500

The population of Wheresville is 2,500 and shrinking by 50 each year.The population of Whatsburg is 1,250 and growing by 75 each year.

Write rules for each population. When do they have the same population?

Wheresville = 2500 - 50x

Whatsburg = 1250 + 75x

Same population (2000) in 10 years

500

Whoever picked this tile has to come up front for a round of pictionary! 

12 seconds to draw, each team gets ONE guess on their board. All right answers get points.

Click to zoom