When finding the inverse of a function, you might get this form of the equation: f(x) = -12x + 7 And you would have to change the f(x) into a (y). However, this equation already has y in place of f(x), so you can just get started!
To find the inverse you want to solve for x, and, thus, you must ISOLATE x from every other term and variable.
1) (subtract 7 from each side) y - 7 = -12x
2) (divide -12 from each side) (y/-12) + (7/12) = x
Now that x is now isolated, you have your answer. Your teacher, however, might want you to change the (y)s in your answer to (x)s.
So the inverse of y = -12x + 7 is (y/-12) + (7/12)
OR (if your teacher wants you to change your (y)s to (x)s in your inverse solution (which they probably do)):
Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).
"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.
In this formula :
y tells us how far up the line goes x tells us how far along m is the Slope or Gradient i.e. how steep the line is b is the Y-intercept i.e. where the line crosses the Y axis
The X and Y intercepts and the Slope are called the line properties. We shall now graph the line y-12x+7 = 0 and calculate its properties
According to: https://www.tiger-algebra.com/drill/y=12x-7/
Since its changing the y, we now it has to be outside the x. So its not A or D. Since it moves up, its a plus. This means its not c, so it has to be B.
