There is a proportional relationship between the amount of time (in hours) that Savannah practices the piano, x, and how many do
llars she earns, y.
What is the constant of proportionality? Write your answer as a whole number or decimal.
______ dollars per hour
A 1dollar
B 3 dollar
C 4 dollar
D 5 dollar
What is the constant of proportionality? Write your answer as a whole number or decimal.
______ dollars per hour
A 1dollar
B 3 dollar
C 4 dollar
D 5 dollar
1 answer:
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Step-by-step explanation:
We have got the lines :
Both lines intercept the x-axis in the point :
In all point from x-axis the y-component is equal to 0.
We replace the I point in the lines equations:
From the first equation :
From the second equation :
Then
Finally :
y = ax + b and y = cx + d have the same x-intercept ⇔ad=bc