If f(x) = 2x -3 what is the value of f(x) when x is -5?

-13    

Step-by-step explanation:

To find the value of f(x) when x is -5, substitute -5 for the x in the equation. Then, simplify:  

So, when x is -5, the value of f(x) will be -13.

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33