anonymous
  • anonymous
What is the slope for the 1st four seconds of the journey. see attached graph.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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anonymous
  • anonymous
sorry??
anonymous
  • anonymous
I am not familiar with trigonometry

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anonymous
  • anonymous
leave all....slope is 2....thats it...
anonymous
  • anonymous
how??
anonymous
  • anonymous
y/x is slope... for 0 to 4 sec y=8 and x=4...so y/x=2
anonymous
  • anonymous
why teacher insisted we use the formula (x2-x) (y2-y)
anonymous
  • anonymous
leave all formulas...the best method it y/x....
anonymous
  • anonymous
I dont understand now y =8
anonymous
  • anonymous
why is y not 4
anonymous
  • anonymous
coz the line is starting from -4.... actually y means y2-y1....and x means x2-x1.....
anonymous
  • anonymous
one point on the graph is (4, 4) another is (2,0) you can use \[\frac{4-0}{4-2}=\frac{4}{2}=2\] if you like
phi
  • phi
You said "why teacher insisted we use the formula (x2-x) (y2-y)" look at your notes more carefully. The teacher said use \[ slope= \frac{y_2 - y_1}{x_2 - x_1} \] where you have 2 points on the line: point1= \( (x_1,y_1) \) point2= \( (x_2,y_2) \) Can you find 2 points on the line that starts at t=0 and ends at t=4 ? It looks like at t=0 d= -4, so in point format that is (0, -4) At t= 4, it looks like d= +4, so another point is (4,4) See Sat's post above on how to use the slope formula to get the answer

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