This question is incomplete, here is the complete question:
On a recent day, 8 euros were worth $9 and 24 euros were worth $27. Write an equation of the form y = kx to show the relationship between the number of euros and the value in dollars.
The equation that represents the relationship between the number of euros and the value in dollars is y = 1.125 x
Step-by-step explanation:
On a resent day;
We need to write an equation of the form y = kx to show the relationship between the number of euros and the value in dollars
∵ The form of the equation is y = kx, where x is the number of
euros and y is the value in dollars
∵ 8 euros were worth $9
∴ (8 , 9) is an ordered pair belong to the equation
∵ 24 euros were worth $27
∴ (24 , 27) is another ordered pair belong to the equation
To find k substitute x and y in the equation by the coordinates of one of these two points
∵ x = 8 and y = 9
∵ y = kx
∴ 9 = 8k
- Divide both sides by 8
∴ 1.125 = k
- Substitute the value of k in the equation
∴ y = 1.125 x
To check the equation substitute x by the x coordinate of the 2nd point if it gives the same value of the y-coordinate of the point then the equation is true
∵ x = 24
∵ y = 1.125 x
∴ y = 1.125(24)
∴ y = 27 the same value of the y-coordinate of the point
∴ The equation is true
The equation that represents the relationship between the number of euros and the value in dollars is y = 1.125 x
Learn more:
You can learn more about the linear equation in brainly.com/question/4326955
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