Hey there!
Assuming that

So, let's solve your function, shall we?

Good luck on your assignment and enjoy your day!
~
Shanice's rate: 93 / 1.5 = 62 miles per hour
she is 10 miles slower than twice the speed of Brandon
62 +10 = 72
72/2 = 36
Brandon is driving 36 miles per hour
The third one is the correct graph for the equation
hope it helps !!