1) reflection across y=-1
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For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. for an 10 month period, the last term is and the series sum is . for a 15 month period, the last term is and the series sum is . for a 20 month period, the last term is and the series sum is

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?

Plzzz answer both questions and i will give you 100 points