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?
y = 10x
y = 4x
C. y = 1/4x + 10
y = 4x + 10
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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.
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Are you familiar with how to find the y-intercept of a given equation in slope-intercept form?
An equation y=mx+b is in slope-intercept form, where m=slope and b=y-intercept.
@jayda ok so far?
From the given graph, can you spot the y-intercept?
would it be 1?
no. Y-intercept is where the curve (line in this case) intersects the y-axis. Can you read it off?
so the y intercept is where you have the curved line?
Can you figure out the y-intercept of the given graph?
ohh . okay . yes
can you do the rest now?
What is the approximate slope and what is the intercept?
isnt the intercept 10 though?
Right, y-intercept is 10.
Did you find the slope?
would it be 4?
would the answer be D?
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.