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lyudmila [28]
3 years ago
11

What is the constant speed of freddy and sam?

Mathematics
2 answers:
dlinn [17]3 years ago
6 0
The constant speed, or "average rate of change" is their slope.

so  hmmm looking at Fred's graph, let's pick two points on the line, say 0,0 the origin and 8,2

\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ 0}}\quad ,&{{ 0}})\quad 
%   (c,d)
&({{8}}\quad ,&{{ 2}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{2-0}{8-0}\implies \cfrac{2}{8}\implies \cfrac{1}{4}

now, for Sam, let's use the last two points in the table then,

\bf \begin{array}{lllll}
&x_1&y_1&x_2&y_2\\
%   (a,b)
&({{ 20}}\quad ,&{{ 2\frac{1}{2}}})\quad 
%   (c,d)
&({{32}}\quad ,&{{ 4}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}\implies \cfrac{4-2\frac{1}{2}}{32-20}\implies \cfrac{4-\frac{5}{2}}{32-20}
\\\\\\
\cfrac{\quad \frac{8-5}{2}\quad }{12}\implies \cfrac{\quad \frac{3}{2}\quad }{\frac{12}{1}}\implies \cfrac{3}{2}\cdot \cfrac{1}{12}\implies \cfrac{1}{8}
KonstantinChe [14]3 years ago
4 0

Answer:

The constant speed of Freddy is o.25 miles per minute

Constant speed of Sam is 0.125 miles per minute

Step-by-step explanation:

To find the constant speed , find out the slope using any two points

Fast  Freddy:

(4,1) (8,2)

To find slope apply slope formula

slope = \frac{y_2-y_1}{x_2-x_1} =\frac{2-1}{8-4} =\frac{1}{4}=0.25

Constant speed is 1/4

Speedy Sam:

(4,0.5) and (32,4)

slope = \frac{y_2-y_1}{x_2-x_1} =\frac{4-0.5}{32-4} =0.125

The constant speed of Freddy is o.25 miles per minute

Constant speed of Sam is 0.125 miles per minute

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-------------------------------------------------------------------------------------------------------------

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