68+7k Jodie pays the power company 68 cents per day for electricity. She purchased a new wind turbine, which costs an average of 7 cents for each kilowatt-hour of electricity that it generates.

slope intercept form: y = mx + b

68 + 7k means that the 68 would be the b term (y-intercept) and the 7 would be the slope of the line on a graph (m)