Constant Proportionality
k=y/x
12 cookies per batch
If the radius of a circle is 12.5 inches what is the diameter?
d=25 inches
How do you find the area of a Circle?
A= (pi)r2
What is the formula you use when you have the constant proportionality?
y=kx
Jackson spent $225 going to the movies with his friends. He bought a total of 12 tickets. How much did each of their tickets cost? (In dollars and cents)
$18.75
What is the diameter of a circle?
From a point on the outside of the circle to another point on the circle that passes through the midpoint.
What is the formula for area of a triangle?
A= 1/2 bh
Lacy has a job putting letters in envelopes to be mailed. In 1 hour she put 37 letters in envelopes.
Write an equation that best represents y, the total number of letters Lacy puts in envelopes in x hours if she continues at this rate?
y=37x
If 3 stuffed animals cost 10 dollars, how much do 12 stuffed animals cost?
$40
What is the formula for Area of a circle?
What is the formula for Circumference of a circle?
A=(pi)r2
C=(pi)d or 2(pi)r
What is the area of a circle with 32 as the radius?
3,215.36
Using the formula y=29x, y representing the total number of letters and x representing the number of hours it takes to to bag the letters.
How long will it take to bag 145 envelopes?
5 hours
A recipe for fruit salad includes 1/2 cup of grapes for 4 servings. How many cups of grapes are needed for 30 servings of this fruit salad?
3 3/4
If i have a circle that has a diameter of 725 mm what is the radius of the circle?
362.5mm
What is the area of this shape?
(teacher will draw)
67.065
What is the constant proportionality of this situation?
y value- 45
x value- 15
k=3
What is the better buy?
12 cans of soda for $23.99
or
24 cans for $37.50
How do you know?
24 cans becuase each can costs $1.56
The radius of circle S is half the radius of circle L. The radius of circle L is 10 millimeters.
What is the circumference and area?
A= 78.5mm2
C=31.4mmWhat is the area of a circle with the radius of 25 cm?
1962.5cm2