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The equation representing the total cost (y) in terms of the number of movie channels (x) is:
y = 22 + 8x
This equation can be rearranged into slope-intercept form (y = mx + b) where m is the slope and b is the y-intercept:
y = 8x + 22
Therefore, the slope of the equation is 8 and the y-intercept is 22.