anonymous
  • anonymous
The scatter plot below shows the weights in ounces of several kittens at various ages. What is the best equation of the trend line through these points? A. y = 10x B. y = 4x C. y = 1/4x + 10 y = 4x + 10
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
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anonymous
  • anonymous
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mathmate
  • mathmate
This is how you proceed for slope-intercept equations. From the graph, read off the y-intercept (=10). Read off the slope (about 15). Check the 4 options to see which one satisfies both conditions. If you can use help reading off the slope and intercept, please post.
anonymous
  • anonymous
what do you mean

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mathmate
  • mathmate
Are you familiar with how to find the y-intercept of a given equation in slope-intercept form?
anonymous
  • anonymous
not really
mathmate
  • mathmate
An equation y=mx+b is in slope-intercept form, where m=slope and b=y-intercept. |dw:1357747417191:dw|
mathmate
  • mathmate
@jayda ok so far?
anonymous
  • anonymous
yes
mathmate
  • mathmate
From the given graph, can you spot the y-intercept?
anonymous
  • anonymous
would it be 1?
mathmate
  • mathmate
no. Y-intercept is where the curve (line in this case) intersects the y-axis. Can you read it off?
anonymous
  • anonymous
so the y intercept is where you have the curved line?
mathmate
  • mathmate
|dw:1357748329385:dw| Can you figure out the y-intercept of the given graph?
anonymous
  • anonymous
ohh . okay . yes
mathmate
  • mathmate
can you do the rest now?
mathmate
  • mathmate
What is the approximate slope and what is the intercept?
anonymous
  • anonymous
isnt the intercept 10 though?
anonymous
  • anonymous
@mathmate ?
mathmate
  • mathmate
Right, y-intercept is 10. Did you find the slope?
anonymous
  • anonymous
would it be 4?
anonymous
  • anonymous
would the answer be D?
mathmate
  • mathmate
Your answer D is correct. You have eliminated A and B because the y-intercepts there are zero. Good job. Between C and D, the difference is the slope. The graph shows that y increases from 10 to 14 between 0 and 1. This implies a slope of (14-10)/(1-0)=4. Therefore answer D is correct.
anonymous
  • anonymous
thank you so much ! (:
mathmate
  • mathmate
yw! :)

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