3 years ago

A student’s standardised mark on a class test was z = –1.7. The mean mark for the class is 55 and the standard

1 answer:

7 0

The answer is 58, standard deviation is basically telling you that the space between each point in your statistics is on average that amount so that can tell us to take the mean mark of 55 and add 2.85 = 57.85

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NNADVOKAT [17]

Answer:

The function r(x) represents a constant rate per unit change in x.

Step-by-step explanation:

This is because when you increase in 2, it goes from 37 to 25, a decrease in 12, then when the x goes from 2 to 3, then it has to drop down by 6, or else it won't be linear. It does. 25-6 is 19. Then it goes from 3 to 5, meaning it has an increase of 2 in x, meaning it has to drop down in 12 to be linear, It does. 19-12 is 7. So it is linear, meaning it has a constant rate per unit change in x.

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