Every time x increases by 1,y decreases by 3,and when x is -6,yis-3.which function models the realation ship between x and y?
a)y= -6x-21
b)y= -6x-3
c)y= -3x-3
d)y= -3x-21

D.

Step-by-step explanation:

We have been given that every time x increases by 1,y decreases by 3. This means that slope of our given line is negative 3.

We will use slope-intercept form of equation to find the required function.

, where,

m = Slope of line,

b= The y-intercept.

Upon substituting and and in slope-intercept form of equation, we will get,

Upon substituting and in slope-intercept form of equation, we will get our required equation as:

Therefore, option D is the correct choice.

46.2+112.3

step-by-step explanation:

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.