Respuesta :

The slope of the line segmenThe slope of the line segment would be 1/4 because the graph is rising by 4 and running by 1, hence 1/4.
1. (1,4)(2,8)
     slope = (8 - 4) / (2 - 1) = 4 <==
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2. Brand A : 9 * 12 = 108
    Brand B : 9 * 15 = 135
   so Brand B costs (135 - 108) = 27 bucks more
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3. both calculated 2/9
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4. initial value is 5