Which relation is a function? PLEASE HELP

Mathematics

2 answers:

olganol [36]2 years ago

6 0

Answer is A I did this

Georgia [21]2 years ago

4 0

Answer:

Step-by-step explanation:

for the relation to be a function then each value of x in the domain must map to exactly one unique value of y in the range

this is the case for A

in B : 3 → 2 and 3 → 8 ← not a function

in C : - 2 → 5 and - 2 → 7 ← not a function

in D : 2 → 2 and 2 → 3 and 3 → 3 and 3 → 2 ← not a function

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B. 1 tailed t-test.

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At the null hypothesis, it is tested if the mean rating of guilt will not be higher for unattractive defendants than for attractive defendants, that is:

$H_0: \mu_U \leq \mu_A$

At the alternative hypothesis, it is tested if the rating is greater, that is:

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We are comparing the means, hence a t-test is used. We are testing if one is greater than other(not different), hence a 1-tailed test is used, and option B is correct.

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2 years ago

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My name is Ann [436]

Answer:

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