Answer:
y-intercept is 30
Step-by-step explanation:
Given the model 
comparing this model to the equation of a straight lines we can get the y- intercept
The y- intercept is 30 which is the constant factor and it describes to us about the one-time registration fee of $30.
C temp. pH and regulatory molecules
They have the same measurements but they are turned different ways
The constant of the proportional relationship graphed in this problem is of 10.
<h3>What is a proportional relationship?</h3>
A proportional relationship is a function in which the output variable is given by the input variable multiplied by a constant of proportionality, that is:
y = kx
In which k is the constant of proportionality.
In this problem, the points on the graph are: (0,0), (2,20), (4,40), ..., hence the constant is:
k = 40/4 = 20/2 = 10.
More can be learned about proportional relationships at brainly.com/question/10424180
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The answer to this question would be 160 cupcakes in 16 hours
