What type of correlation is shown in this scatter plot?

1 answer:

6 0

I think C
<span>Just because this set of data showed a positive correlation does not mean that the relationship is positive for all sets of data concerning study time and Regents scores. There may be sets of data that show that there is NOT a positive correlation between hours studying and better Regents scores</span>

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Please help and explain!

Scrat [10]

K is the slope of the line formed by connecting the points.
Use slope formula:
$\frac{y_2 - y_1}{x_2 - x_1}$
where the 2 points are the end points of the line (First and last going Left to right)
$(x_1,y_1) = (2,7) \\ (x_2,y_2) = (8,28)$
Substitute into slope formula
$k= \frac{28-7}{8-2} = \frac{21}{6} = \frac{7}{2}$
You can check if this is correct by going back to graph and going "up 7" and "over 2" to get from one point to the next.

5 0

3 years ago

Two mechanics worked on a car. The first mechanic charged $55 per hour, and the second mechanic charged $60 per hour. The mechan

Nady [450]

Answer:

15 and 5 hours.

Step-by-step explanation:

Call x the time taken by the first chap, and y the second.

$\left \{ {{x+y = 20 \atop {55x+60y=1125}} \right.$