Subtrack k from 7 then triple the result

Subtract k from 7: k-7

then triple the result: 3(k-7)

if you want to solve for k then

3(k-7)

=3k - 21

or 3k = 21

divide both sides by 3

3k/3 = 21/3

k =7

f(x) is the value of the function. b is the value of the function when x equals zero or the y-coordinate of the point where the line crosses the y-axis in the coordinate plane.

step-by-step explanation:

hope this !

answer:     true

step-by-step explanation: