The answer for this is (-2,-4) because the x axis is horizontal so it on the other side ( see picture )
Y is in direct proportion to x. x = 25, y = 5. Find the value of y, if x = 9.
2 answers:
Answer:
y = 1.8
Step-by-step explanation:
given y is in direct proportion to x then the equation relating them is
y = kx ← k is the constant of proportion
to find k use the condition x = 25, y = 5 , then
5 = 25k ( divide both sides by 25 )
=
= 0.2 = k
y = 0.2x ← equation of proportion
when x = 9 , then
y = 0.2 × 9 = 1.8
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Using conditional probability, it is found that there is a 0.8462 = 84.62% probability that a woman who gets a positive test result is truly pregnant.
<h3>What is Conditional Probability?</h3>Conditional probability is the probability of one event happening, considering a previous event. The formula is:
In which
- P(B|A) is the probability of event B happening, given that A happened.
is the probability of both A and B happening.
- P(A) is the probability of A happening.
In this problem, the events are:
- Event A: Positive test result.
- Event B: Pregnant.
The probability of a positive test result is composed by:
- 99% of 10%(truly pregnant).
- 2% of 90%(not pregnant).
Hence:
The probability of both a positive test result and pregnancy is:
Hence, the conditional probability is:
0.8462 = 84.62% probability that a woman who gets a positive test result is truly pregnant.
You can learn more about conditional probability at brainly.com/question/14398287