X can be any number in the graph as long as it is on the x-axis therefore you can put x as -1,0 and 1. Then you would need to replace the ‘x’ in the equation so it would look like y=-2*1+3. You replace ‘x’ with every number you put in the x boxes. Then just solve the equations
y=-2*1+3
Y=-2*0+3
Y=-2*-1+3
They would give you the y axis coordinates so then you just put them together for the middle column.
Answer
y=-2*1+3=1
Y=-2*0+3=3
Y=-2*-1+3=5
Coordinates are (1,3) (0,3) (-1,5)
38 purchases but why do i feel like that’s wrong♀️
Answer:
For (iv) the answer is 26587199959
Step-by-step explanation:
Answer:
A sample size of 285 is needed.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
That is z with a pvalue of , so Z = 1.96.
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
Standard deviation is $4300
This means that
What sample size do you need to have a margin of error equal to $500 with 95% confidence?
A sample size of n is needed. n is found when M = 500. So
Rounding up
A sample size of 285 is needed.