Answer:
Pam has 1/2 of the cake and liz has 1/4 of the cake and then sam has 3 1/8 of the cake
Step-by-step explanation:
Try to put it in your own words
y=9
Slope: 9-9/-2-15=0
Therefore, y=0x+b
Plug values in: 9=0(-2)+b
0+b=9
b=9
Therefore, equation is y=9