Question: A plumber charges a flat $50 for a home service call plus $10 per 15 minutes of labour. Write an equation for calculating the total

A plumber charges a flat $50 for a home service call plus $10 per 15 minutes of labour. Write an equation for calculating the total charges, C, in terms of the hours of labour, H. If you were to plot a graph of C vs. H, what would be the slope and C-intercept of the line?

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