Answer:
A. C=0.25t + 0.74
Explanation:
To prove this, plug in the number of toppings into t. We can already know that B and D are incorrect given that there are no t values and the answer to those are 0.99 and 1.74. Now, when 4 is inserted into the t variable in equation C, it comes out to 3.99, which doesn't fit the situation. However, when 4 is inserted into the t variable in equation A, it comes out to 1.74, which does fit the situation. For further explanation, when 7 is inserted into the t variable in equation D, it equals 6.24, while when put into equation A it equals 2.49, as shown in the question.
Hope this helps!