
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
The graph shows the total distance Dana drove from 8 a.m to 2 p.m. How many miles per hour is the car's average speed for the period from 8 a.m. to 2 p.m.?

[asy]
unitsize(0.2inch);
draw((0,0)--(6.5,0));
draw((0,0)--(0,8.5));
draw((1,0)--(1,8.5));
draw((2,0)--(2,8.5));
draw((3,0)--(3,8.5));
draw((4,0)--(4,8.5));
draw((5,0)--(5,8.5));
draw((6,0)--(6,8.5));
draw((0,1)--(6.5,1));
draw((0,8)--(6.5,8));
draw((0,7)--(6.5,7));
draw((0,6)--(6.5,6));
draw((0,5)--(6.5,5));
draw((0,4)--(6.5,4));
draw((0,3)--(6.5,3));
draw((0,2)--(6.5,2));
draw((0,0)--(1,1)--(2,2)--(3,4)--(4,5)--(5,7)--(6,8));
dot((0,0));
dot((1,1));
dot((2,2));
dot((3,4));
dot((4,5));
dot((5,7));
dot((6,8));
label("8",(0,-0.5),S);
label("9",(1,-0.5),S);
label("10",(2,-0.5),S);
label("11",(3,-0.5),S);
label("12",(4,-0.5),S);
label("1",(5,-0.5),S);
label("2",(6,-0.5),S);
label("0",(-0.5,0),W);
label("40",(-0.5,2),W);
label("80",(-0.5,4),W);
label("120",(-0.5,6),W);
label("160",(-0.5,8),W);
label("Time of Day (a.m.)",(2.9,-2),S);
label("Total distance",(-0.5,9),N);
[/asy]

Present the answer in LaTex format: \boxed{Your answer}
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