Answer:
-2 
Step-by-step explanation:
 
        
             
        
        
        
Answer:
<em>m=1.7</em>
<em>C=68 gr</em>
Step-by-step explanation:
<u>Function Modeling</u>
We are given a relationship between the carbohydrates used by a professional tennis player during a strenuous workout and the time in minutes as 1.7 grams per minute. Being C the carbohydrates in grams and t the time in minutes, the model is

The slope m of the line is the coefficient of the independent variable, thus m=1.7
The graph of C vs t is shown in the image below.
To find how many carbohydrates the athlete would use in t=40 min, we plug in the value into the equation

 
        
             
        
        
        
Write and solve an equation of ratios to answer this.
2.25 cup              x
-------------- = -------------
0.375 cup          1 cup
                                                                                  2.25
cross-multiplying, 2.25 = 0.375x.  Solving for x, x = ---------- = 6
                                                                                   0.375
Brianna would need to use 6 cups of flour if she wants the mixture to contain 1 cup of baking soda.
        
                    
             
        
        
        
45 goes into 240 5.33 times