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

1. ValentinaT Group Title

I need help with part c.

2. BluFoot Group Title

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

3. ValentinaT Group Title

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

4. BluFoot Group Title

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

5. BluFoot Group Title

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

6. ValentinaT Group Title

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

7. BluFoot Group Title

Perfect, good job :)

8. ValentinaT Group Title

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

9. BluFoot Group Title

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