No Time Like the Percent
Better Rate than Never
Before Your Vari(ation) Eyes
Fimilar Sigures
Function Junction
100
20% of 75
What is 15?
100
Other names for rate of change.
What are unit rate, constant of proportionality, and k?
100
Equation for direct variation.
What is y = kx?
100
In two similar figures, corresponding angles and sides are this.
What are equal and proportional?
100
The mapping diagram below shows this.
What is a function?
200
Formula (equation) for percent change.
What is (%/100) = (new - original)/original?
200
The total cost of ears of corn at the grocery store depends upon how many ears of corn you buy. 5 ears cost $1.50, and 8 ears cost $2.40. The constant rate of change is this.
What is $0.30?
200
The number of pencils sold varies directly as the cost. If 5 pencils cost $0.45, the cost of 7 pencils is this.
What is $0.63?
200
The triangles below are similar. The side corresponding to RS is this side.
What is TS?
200
In a relation where y is a function of x, each x-value will correspond to this many y-values.
What is one?
300
In 2000, a hotdog cost $2.50. In 2015, a hotdog costs $2. The percent change of the price of a hotdog is this.
What is -20% (decrease)?
300
The graph below has a constant of proportionality that is this number.
What is 12.5?
300
Suppose y varies directly as x. If x = 27 when y = 6, x equals this when y = 2.
What is 9?
300
The two trapezoids are similar. The length of GH is this.
What is 5.5 inches?
300
The graph below shows a function. (True or False)
What is false?
400
The price of a gallon of gas dropped from the summer high price of $3.50 to the winter low price of $2.87. The price of gas was reduced by this much.
What is 18%?
400
Based on the table below, a supermarket gives out samples to customers at this rate.
What is 38 samples per hour?
400
The bending of a beam varies directly as its mass. A beam bends 20mm by a mass of 40kg. A beam with a mass of 100kg will bend this much.
What is 50mm?
400
The Gateway Arch in Missouri casts a 140-foot shadow while an 18-foot pole casts a 4-foot shadow. The Gateway Arch is this tall.
What is 630 ft?
400
The graph below shows a function. (True or False)
What is true?
500
The high school graduating class of 2000 was 260 students. 5 years later, the graduating class was 320 students. By 2010, the graduating class rose to 400 students. The high school graduating class experienced the greatest percent in this five-year period.
What is 2010 (25% increase)?
(2005 had a 23% increase)
500
The following table can be represented by this equation. (Hint: y = kx)
What is y = 10x?
500
Suppose y varies directly as x. If y = -4 when x = 32, x equals this when y = -0.375
What is 3?
500
The two triangles are similar. The perimeter of triangle MNO is this.
What is 20 inches?
500
If f(x) = −20+11x, then f(11) = this.
What is 101?