What is an equation of the line that passes through the points (-3,1) and (-4,0)
2 answers:
Answer:
<u>y = 1x + 4</u>
Step-by-step explanation:
Since this is a straight line, we can take any two points and calculate the Rise/Run, or slope, of the line.
Rise = (0-1) = -1
Run = (-4 - (-3)) = -1
Slope = Rise/Run = -1/-1 = 1
The line has the form of y = 1x + b, where b is the y intercept (the value of y when x = 0).
We can find a value of b that will force the line through both points. Given the form y = 1x + b, enter either of the two pints into the equation and solve for b. I'll use (-3,1),
y = 1x + b1
1 = 1*(-3) + b
b = 4
The equation is y = 1x + 4
See attached image.
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Answer:
The mean number of adults who would have bank savings accounts is 32.
Step-by-step explanation:
For each adult surveyed, there are only two possible outcomes. Either they have bank savings accounts, or they do not. So we use the binomial probability distribution to solve this problem.
Binomial probability distribution
Probability of exactly x sucesses on n repeated trials, with p probability.
The expected value of the binomial distribution is:
In this problem, we have that:
If we were to survey 50 randomly selected adults, find the mean number of adults who would have bank savings accounts.
This is E(X) when .
So
The mean number of adults who would have bank savings accounts is 32.