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What is the common difference in the following arithmetic sequence 7,3,-1,-5

Find the equation of the line that goes through the points (4, –1) and (2, –5). use slope formula, equation, to find the slope of a line that passes through the points. m = use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line. b = write the equation in slope-intercept form, y = mx + b.

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81