anonymous
  • anonymous
Will I actually get an answer on this one? Or will I wait for nothing like last question! A 5 mile cab ride cost 7.20 a 9 mile cab ride cost 11.60 find a linear equation that models a relationship between cost c and distance d A. c=1.44d+4.40 B. d=1.10c+4.40 C. c=1.29d+1.70 D. c=1.10d+1.70
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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kropot72
  • kropot72
The distance d is equivalent to the x variable, and the cost c is equivalent to the y variable. So we can find the slope from the ordered pairs (5, 7.2) and (9, 11.6). Are you with me?
anonymous
  • anonymous
yes
kropot72
  • kropot72
\[m=\frac{11.6-7.2}{9-5}=you\ can\ calculate\]

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More answers

anonymous
  • anonymous
2.4
kropot72
  • kropot72
Not really. The numerator simplifies to 4.4 and the denominator simplifies to 4. What did you get?
kropot72
  • kropot72
\[m=\frac{11.6-7.2}{9-5}=\frac{4.4}{4}=?\]
anonymous
  • anonymous
1.4
anonymous
  • anonymous
its a correct
kropot72
  • kropot72
No. m = 4.4/4 = 1.1 Now we have a value for m, the linear equation can be written as: c = 1.10d + b where b is a constant that needs to be found by substition as follows: 7.2 = (1.10 * 5) + b ........(1) Can you solve equation (1) tnd the value of b ?
kropot72
  • kropot72
substitution*
anonymous
  • anonymous
I got d
kropot72
  • kropot72
Well you can find that d is the correct choice without finding the value of the constant. But you will learn more by finding the value of b.
anonymous
  • anonymous
We have two points (5, 7.20) and (9, 11.60) So use the slope formula to get m = (y2-y1)/(x2-x1) m = ( 11.60- 7.20)/(9-5) m = (4.4)/4 m = 1.1 So the slope of the line that passes through the two points is 1.1

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