michellemonroe012305
07.07.2019 •
Mathematics
Q# 9 : the table shows the height of a plant as it grows.what equation in point-slope form gives the plant's height at anytime? let y stand for the height of the plant in cm and let x stand for the time in months
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Ответ:
First option. y-15=5(x-3)
Solution:
We can take any pair of points of the table. For example:
P1=(3, 15)=(x1, y1)→x1=3, y1=15
P2=(5, 25)=(x2,y2)→x2=5, y2=25
And we can find the slope m using the following formula:
m=(y2-y1)/(x2-x1)
m=(25-15)/(5-3)
m=(10)/(2)
m=5
Now we can apply the point-slope formula to find the equation of the right line:
y-y1=m(x-x1)
Replacing y1=15, m=5, and x1=3
y-15=5(x-3)
Ответ:
20.125 miles
Step-by-step explanation:
Use cross multiplication method.