Name: SAT Math Help & School Math Mastery
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#16278

data analysis

linear

hard

60 sec

A line of best fit for data set R has the equation $y = - 3 x + 15$ . Data set S is created by multiplying the $y$ -coordinate of each data point from data set R by $- 2$ . Which of the following could be an equation of a line of best fit for data set S?

A.

$y = - 3 x - 30$

B.

$y = 6 x + 15$

C.

$y = 6 x - 30$

D.

$y = - 2 x + 15$