The polynomial function f(x)=3x5-2x2+7x
2 answers:
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Answer: y = 7.5
Step-by-step explanation:
Suppose that y varies directly with x
That is, y∝x
Convert y∝x to a full equation by introducing a constant k to the right hand side.
Therefore, y = kx
Given that y = 10 and x = 20
Substitute y and x in the equation above. We have;
10 = k(20)
10 = 20k
20k = 10
k = 10/20
k = 0.5
Since k = 0.5, the equation y = kx becomes y = 0.5x
Now, to find y if x = 15, substitute x in equation y = 0.5x
Therefore, y = 0.5(15)
y = 7.5
The point (12, 190) means that the temperature after 12 hours is 190 degrees Celsius
<h3>How to make a scatter plot?</h3>To do this, we make use of the following points
(12, 190), (14, 201), (15, 301), (16, 305), (18, 350), (20, 40), (25, 450)
Where x represents the number of hours and y represents temperature
See attachment for the scatter plot.
<h3>The description of a point</h3>To do this, we make use of the point (12, 190)
This means that the temperature after 12 hours is 190 degrees Celsius
Read more about scatter plots at:
#SPJ1
