## blast234 Group Title thanks one year ago one year ago

1. bthemesandtricks Group Title

Just a second. I'll get back shortly

2. zepdrix Group Title

Lets write it as Height being a function of time. They told us that we can model it as a linear function, so lets do that! :) It will be of the form: y=mx+b So we have a function: h(t)=mt+b So they gave us some information. h(3)=17 h(5)=15 We'll write these as ordered pairs. (3,17) (5,15). We'll find the m value (slope of our line) by using this form. $m=\frac{ y_2-y_1 }{ x_2-x_1 }$Which for us will be written like this:$m=\frac{ h(5)-h(3) }{ 5-3 }$$=\frac{ 15-17 }{ 5-3 }$$=\frac{ -2 }{ 2 }= -1$

3. zepdrix Group Title

Ok the last part is asking what is h(8). Just plug 8 in for t :D

4. zepdrix Group Title

oh the 20, sorry lemme bcak up :D

5. bthemesandtricks Group Title

\good work zepdrix

6. zepdrix Group Title

so you've gotten the formula this far: h(t)=-t+b So you can use some of your previous information to solve for b. Plug in the height and time (3,17), and solve for b.

7. blast234 Group Title

So this will help me get 20

8. blast234 Group Title

I don't understand

9. zepdrix Group Title

so plugging in 3 and 17 gives us this equation 17=-(3) + b b= 17 + 3 = 20 giving us an equation: h(t)=-t+20 Then for your last part, find h(8)

10. zepdrix Group Title

it is a line, an equation can be written in the form: y=mx+b If you'll see from my previous notes, we found the slope of the equation (the m value) to be -1.

11. blast234 Group Title

never mind i understand