The double number line shows that in
2
22 minutes, pogo the dog can fetch a frisbee
6
66 times.

0
0
2
2
time
time
(minutes)
(minutes)

0
0
6
6
fetches
fetches
based on the ratio shown in the double number line, how many times will pogo fetch the frisbee in
4
44 minutes?

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.

1st integer x

2nd integer x+1

3rd integer x+2

4th integer x+3

x+x+1 +x+2+x+3 =74

combine like terms

4x+6 = 74

subtract 6 from each side

4x = 68

x = 17

the integers are 17,18,19,20

~dasgupta/mathbook/append17dec2k8.pdf