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kps26pd2mea
15.07.2021 •
Mathematics
Which equation is represented by the graph below? choices in picture
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Ответ:
Ответ:
x-intercept:
A line that crosses the graph at x-axis.
i.e substitute y = 0 and solve for x.
As per the statement:
A biologist created the following graph to show the relationship between the temperature of water (x), in degrees Celsius, and the number of insect larvae (y) in the water
Given the graph:
Substitute y = 0 we have;
⇒![-2(x^2-10x-200) = 0](/tpl/images/0472/5363/d675e.png)
⇒![x^2-10x-200 =0](/tpl/images/0472/5363/5bb9f.png)
⇒![x^2-20x+10x-200 =0](/tpl/images/0472/5363/9891b.png)
⇒![x(x-20)+10(x-20)=0](/tpl/images/0472/5363/afbe7.png)
⇒![(x-20)(x+10)=0](/tpl/images/0472/5363/f04f2.png)
By zero product property we have;
x-20 =0 and x+10 = 0
⇒x = 20 and x = -10
Therefore, the x-intercept represents the water has no larvae at −10 degrees Celsius and 20 degrees Celsius.