ValentinaT
Rate of change help?



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ValentinaT
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I need help with part c.

BluFoot
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\[\frac{ Y2Y1 }{ X2X1}\]
Can you find two coordinates on the line? (x1,y1) and (x2,y2)

ValentinaT
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So, 25 would be Y, and 3 would be x?

BluFoot
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Yeah that's one point! Another point is (0,0) right?

BluFoot
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Now use those two coordinates to find the rate of change using the formula above.

ValentinaT
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Yeah, so \[\frac{ 25  0}{ 3  0 } = \frac{ 25 }{ 3}\]

BluFoot
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Perfect, good job :)

ValentinaT
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Thanks, so is that the answer or is it 8.333...?

BluFoot
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Fractions are generally more accurate than decimals, but it depends what your teacher is asking for. If in doubt, keep it as a fraction!