Math Challenge

8th Grade Geo

100

Moving a figure down 2 units and right 3 units is called a....

What is translation

200

Flipping a figure over the y-axis is called...

What is reflection?

300

Turning a figure 90 degrees clockwise about the origin

What is rotation?

400

The collective term for translations, reflections, and rotations and dilations

What is transformations?

500

Point A(7, 4) is rotated 180 clockwise around the origin (0, 0). What is the coordinate now? 

A'(-7, -4)

8th Grade Graphing

100

The number that doesn't fit the data set is called an...

outlier!

200

A line going up and do the right would have a _______ slope. 

Positive

300

What is the formula for the constant of proportionality? 

y/x=k

400

What are the names of the vertical and horizontal axes of a graph? 

Vertical = y axis 

Horizontal = x axis

500

y = 1/3x - 3 

Name each part of the equation

y: output

1/3: slope

x: input

-3: y-intercept

Slope

100

Rise over run is also known as...

What is slope

200

The slope of the line with the points (4,0) and (6,0)

Slope = 0

300

y = 3x + 2. What is the slope? 

Slope = 3

400

Rewrite the following equation in slope intercept form: 

6x + 3y = 18

y = -2x + 6

500

What is the point-slope formula? (Formula used to solve for the slope when given two points)

y_{2 -} y₁ / x_{2 -} x₁

Unit Rates and Proportions

100

Billy ate 120 hotdogs in 10 hours. How many hotdogs per hour did he eat? 

12 hotdogs / hour

200

A 2ft tall tree was planted in Mr. Smith's backyard. every year the tree grew 1.5ft. Is this an example of a proportional relationship? Explain. 

No. The tree was already 2 ft when it was planted. 

300

A car going at a constant speed of 65 mph traveled for 6.5 hours. How many miles did the car travel in that time? 

422.5 miles

400

Sammy's Kayak rental company charges $15 to rent a kayak then an additional $5/hour. 

Jorge's Kayak rental company charges $8/hour to rent a kayak. 

Which company would be cheaper if you rented for 4 hours? 

Jorge's would cost $32 wile Sammy's would cost $35. 

Jorge's is cheaper

500

First grade student Josh measured his heights every month for a year. 

Josh: Starting height 36 inches. End height 48 inches. What is Josh's unit rate in Inches/month? 

1 inch/month

Trivia

100

What is Mr. Lopez's dog's name? 

Davy Jones

200

If a line is parallel to another, it has _____ solutions

no solutions

300

Say this number out loud: 143,286,394,990.12

Verbal

400

Another name for the average rate of change.

What are slopes?

500

What year was Friday Harbor founded? 

1909