Perfectly correct. Two quarters do make a half :)
To find the inverse, interchange the variables and solve for y.
f^−1(x)=−25+5x/2
To find X, we can divide 5 into 40.
40 divided by 5 is 8.
Now we can do 5 x 8. That is 40.
X=40
OR we can do it another way.
40 divided by 5 is 8.
Cross out 5 divided by 5.
Now we have 8. Still.
X is 8

To rotate a point around the origin by 180 degrees, multiply both parts of the coordinate point by
. (This means you go from
to
.)

