Need plzz because i dont i'm kinda suck math

The first table, on the left of the page, lists five points on a graph that has zero slope.

No matter what the value of ' x ' is in the first column of this table, the value of ' y ' never changes.  It's always 2 .

If you draw these points on a graph, thay're all on a horizontal line.  

Anything horizontal has zero slope, just like flat ground.

687.09 dollars       happy now

step-by-step explanation: 6870

1857 times .63 equals 1169.91 subtract that from 1857 you get 687.09

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%