Company A represents a proportional relationship, while company B does not.
<h3>Proportional relationship</h3>
The general format of a equation representing a proportional relationship is given as follows:
y = rx.
A proportional relationship is a special case of a linear function, having an intercept of zero.
Then, the output variable y is calculated as the multiplication of the input variable x by the constant of proportionality k.
The costs for each company after x months, in this problem, are represented as follows:
Company B has an intercept different of zero, hence it is not a proportional relationship, while Company A, with an intercept of zero, represents a proportional relationship.
<h3>Missing Information</h3>
The complete problem is:
Two companies offer digital cable television as described below.
Company A: $39.99 per month no installation fee
Company B: $34.99 per month with a $50 installation fee
For each company tell whether the relationship is proportional between months of service and total cost is a proportional relationship. Explain why or why not
More can be learned about proportional relationships at brainly.com/question/10424180
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