Asked by andrea
The number of Hybrid vehicles sold weekly at a local car lot increased from 11 in 2006 to 19 in 2008. Predict the number of Hybrid vehicles sold weekly in 2011.
My answer:
rate = 19 - 11
2008 - 2006
rate = 8
2
rate = 4
then I subtracted 2011 from 2008 got 3 and multiplied that by 4 to get
12 as the # of cars a wk per yr. increase. Is this right?
My answer:
rate = 19 - 11
2008 - 2006
rate = 8
2
rate = 4
then I subtracted 2011 from 2008 got 3 and multiplied that by 4 to get
12 as the # of cars a wk per yr. increase. Is this right?
Answers
Answered by
Kate
You really should write a linear equation:
You're right on calculating the rate. It is 4. You can also call that the slope of the line. In y=mx+b form,
y=4x+b Since you started at 11 in 2006, 11 is your y-intercept (b)
y=4x+11
Again, since you started at 2006, 2011 is 5 years from that so plug in 5 for x.
y=4*5+11=31.
Does this make sense or did you not start linear equations yet??
You're right on calculating the rate. It is 4. You can also call that the slope of the line. In y=mx+b form,
y=4x+b Since you started at 11 in 2006, 11 is your y-intercept (b)
y=4x+11
Again, since you started at 2006, 2011 is 5 years from that so plug in 5 for x.
y=4*5+11=31.
Does this make sense or did you not start linear equations yet??