246 x 18%=tip
Tip= 246 x .18
Tip=44.28
Tip+bill=total cost
44.28+246= 290.28
Or
246 x 1.18= 290.28
To find the inverse, interchange the variables and solve for y.
f^-1 (x) = 4 + x/2
C because the angles correspond because they are on the same line
1:7/12
2:2/12
3:4/12
4:2/12
5:11/12
6:6/12
7:11/12
8:13/15
you can reduce if possible