MATH QuestionsShow work/explanation where indicated.1. (4 pts) Which of these graphs represent a one-to-one function?Answer(s): ____A______(no explanation required.)(There may be more than one graph that qualifies.)(A)(B)(C)(D)
2. (6 pts) Students in a math class took a final exam (with a grade scale of 0 to 100) and then took equivalentforms of the exam at monthly intervals thereafter. The average gradegaftertmonths was found to be given bythe functiong(t) = 786.5 ln(t+ 1),t(Note that "ln" refers to the natural log function)(explanation optional)Using the model,(a) What was the average grade when the students initially took the exam, whent= 0?0.0
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(b) What was the average grade on the exam when taken 3 months later, to the nearest integer?
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