proportions, graphing

[sneekyog]

if after 2 seconds,the velocity of an object is 64 fps, what will the velocity be after 3 sec?

Find the equation of the line that passes through the point (1,3) and is parallel to the line that passes through (1,5) and (2,7)

find the equation of the line parallel to y=5 and contains the point (2,7)

 

[tkhunny]

"if after 2 seconds,the velocity of an object is 64 fps, what will the velocity be after 3 sec?"

We probably should assume constant accelerations? You must know this:
Position: x(t) = at^2 + vt + h
Velocity: v(t) = 2at + v
Acceleration: a(t) = 2a

Use v(t) and the given information. It's an algebra problem.

"Find the equation of the line that passes through the point (1,3) and is parallel to the line that passes through (1,5) and (2,7)"

You are expected to know that parallel lines have the same slope.
Use the last to lines to calculate the slope.
Use the point-slope form to write the equation.

find the equation of the line parallel to y=5 and contains the point (2,7)
See the previous problem

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