Use the endpoints of this data table to come up with a linear model, f(x) = mx + b. Show all your steps clearly. Use your function to come up with a value for f(7).

x f(x)
0 91
1 71
2 71
3 53
4 20

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Ответ:

sharri44

23.01.2021

Mathematics

3.5 hours

Step-by-step explanation:

Speed of train X=30 mph

Speed of train Y=40 mph

Relative speed When the two trains travelling in same direction

Relative speed=40-30=10 mph

Total distance =25+10=35 miles

We have to find the time when train Y is 10 miles ahead of train X.

We know that

Time= $\frac{Distance}{Relative\;speed}$

Using the formula

Then, we get

Time= $\frac{35}{10}=3.5 hours$

Hence, it will be 3.5 hours until train Y is 10 miles ahead of train X.

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Use the endpoints of this data table to come up with a linear model, f(x) = mx + b. Show all your steps clearly. Use your function to come up with a value for f(7). x f(x) 0 91 1 71 2 71 3 53 4 20