Gradient =2 because the slope is 2 units. Y-intercept = -2 because it crosses the y-line at -2.
Answer:

Step-by-step explanation:






Which stem-and-leaf plot represents the data 80, 81, 91, 92, 66, 55, 54, 30, 55, 79, 78?
const2013 [10]
Convert the given data into ascending order.
30,54,55,55,66,78,79,80,81,91,92
Here the minimum value is 30 and maximum is 92.
Total counts=11
Now plot the data.
Stem | Leaf
3 | 0
5 | 4 5 5
6 | 6
7 | 8 9
8 | 0 1
9 | 1 2
This is the required stem leaf plot.
30/100× 250 = 70
250 - 70 = 180
agree, he'll save up to $70 and get the ipod at price $180