Answer:
The third choice
Step-by-step explanation:
a relation is a function if an input has at most one output for a given input
Choices 1, 2 and 4 are not functions as they have two different outputs for the same input. (See the red ovals)
A. Shows it in fraction form
At the start, Ben and Rick have the same amount of money. Let x represent that amount.
Rick's money: x
Ben's money: x
Then, Ben spends $138.
Rick's money: x
Ben's money: x - 138
At that point, Rick has 4 times the amount that Ben has.
x = 4(x - 138)
x = 4x - 552
552 = 3x
184 = x
Rick has $184.
Answer:
No
Step-by-step explanation:
To represent an exponential function, then it must be "y = a^x" where a is any real number, and x is just x.