Answer:

Step-by-step explanation:
-The margin of error is calculated using the formula:

-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:

Hence, the population standard deviation is 547.1125
We can't see the graph so we don't know the question
Because the equation is a positive number lower than the original
Answer: 77 seeds
Step-by-step explanation:
Given: The germination rate for zinnia seeds =78%
Let x be the total number of seeds he planted, then
The seeds germinated= 78% of x
⇒The seeds germinated= 0.78x
If James wants 60 zinnia plants for his yard, then it will give the equation

Hence, he should plant 77 seeds .
Answer:
y=-2x+2
Step-by-step explanation:
it has a positive slope
the line should point like this on the graph: picture above