Yes the relation is a function
Answer:
r = 
Step-by-step explanation:
Given the proportional equation
y = rx ← r is the constant of proportion
Divide both sides by x
= r
Use any ordered pair from the table.
Using (8, 2 ) , then
r =
= 
3x+50=6x-10
subtract 3x
50=3x-10
add 10
60=3x
divide by 3
20=x
Answer:
$7.80
Step-by-step explanation:
$2.60 * 3 = $7.80
Answer:
p = 2.7x - 20
p(90) = $223
Step-by-step explanation:
revenue → f(x) = 3x ,where x is the number of downloads.
the statement “Your profit p is $20 less than 90% of the revenue for x downloads”
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………………………………
the profit for 90 downloads :
= p(90)
= 2.7×(90) - 20
= $223