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3 years ago

Can someone help me, my homework is due right now. Also will give brainliest.Give an explanation to! Thank you!

Mathematics

1 answer:

Andreyy893 years ago

3 0

Answer:

The rate of change is the slope of the graph. In the equation y=4x+2, the rate of change is 4. In this graph the rate of change is 5, meaning that the rate of change is higher for the function shown on the graph.

However, the starting point for the line y=4x+2 is 2, compared to this starting point of -6. This means this graph has a lower starting point, meaning that option B is correct.

Let me know if this helps!

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Y_Kistochka [10]

Answer:

The z-score for SAT exam of junior is much small than his ACT score. This means he performed well in his ACT exam and performed poor in his SAT exam.

Step-by-step explanation:

Mean SAT scores = 1026

Standard Deviation = 209

Mean ACT score = 20.8

Standard Deviation = 4.8

We are given SAT and ACT scores of a student and we have to compare them. We cannot compare them directly so we have to Normalize them i.e. convert them into such a form that we can compare the numbers in a meaningful manner. The best way out is to convert both the values into their equivalent z-scores and then do the comparison. Comparison of equivalent z-scores will tell us which score is higher and which is lower.

The formula to calculate the z-score is:

$z=\frac{x-\mu}{\sigma}$

Here, μ is the mean and σ is the standard deviation. x is the value we want to convert to z score.

z-score for junior scoring 860 in SAT exam will be:

$z=\frac{860-1026}{209}=-7.59$

z-score for junior scoring 16 in ACT exam will be:

$z=\frac{16-20.8}{4.8}=-1$

The z-score for SAT exam of junior is much small than his ACT score. This means he performed well in his ACT exam and performed poor in his SAT exam.

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