Find the slope of the line that passes through the points (0,0) and (0,-6) Find the slope of the line that passes through (1,3) and (3,-2)

Find the slope of the line that passed through the points (-10,-2) and (-8,8)

pls help

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