The graph shows a jogger's speed (the y-axis) over his first 13 minutes of a run. at what speed does the jogger maintain for most of his run
a) 3 mph
b) 4 mph
c) 5 mph
d) 6 mph

C) 5 mph

Step-by-step explanation:

Since here it is given that the y-axis represents the speed of jogger.

Hence, the speed that jogger maintain for most of his run is: 5 mph

Because the value of y is 5 many times that is the value of y is constant from 1 to 5 and then 9 to 10.

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

show us the picture

step-by-step explanation:

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