Question

Rate of change help?

Answer 1

I need help with part c.

Answer 2

\[\frac{ Y2-Y1 }{ X2-X1}\]

Can you find two coordinates on the line? (x1,y1) and (x2,y2)

Answer 3

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

Answer 4

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

Answer 5

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

Answer 6

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

Answer 7

Perfect, good job :)

Answer 8

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

Answer 9

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