## ValentinaT Group Title Rate of change help? one year ago one year ago

1. ValentinaT

I need help with part c.

2. BluFoot

$\frac{ Y2-Y1 }{ X2-X1}$ Can you find two coordinates on the line? (x1,y1) and (x2,y2)

3. ValentinaT

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

4. BluFoot

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

5. BluFoot

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

6. ValentinaT

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

7. BluFoot

Perfect, good job :)

8. ValentinaT

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

9. BluFoot

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