Hello!
The graph, (2/5)^x is an exponential function.
Since there is not a negative symbol in the front of the function, options A and B are incorrect.
For option 3 to be correct, there would need to be a negative symbol in front of the exponent, x.
So therefore, the answer option 4. (Also, I'll post a graph. :))
Let's use the variable E to represent the total value spent by Elena and T to represent the total value spent by Taniy.
If Elena spent $7.45 plus the cost of 3 pounds of cherries, the expression for the amount she spent is:
Taniy spent $3.35 plus the cost of 2 pounds of cherries, so the expression for the amount the spent is:
To find how much more Elena spent, let's subtract both expressions:
Therefore the answer is 4.1 + p.