The arch of a bridge can be modeled by
d="TexFormula1" title="y=-\frac{1}{170}(x-225)(x+225)" alt="y=-\frac{1}{170}(x-225)(x+225)" align="absmiddle" class="latex-formula">, where 
and 
are measured in feet. The -axis represents the ground. Find the width of the arch of the bridge at ground level.
2 answers:
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Answer:
(a)23 (b)90 (c)3
Step-by-step explanation:
The equation for the line of best fit for this situation is given as
where x=average temperature in degrees
y=average number of hot dogs she sold,
(a) The expected number of hot dogs sold when the temperature is 50° would be___hot dogs.
When x=50°
When the temperature is 50°, the expected number of hot dogs sold would be 23.
(b)If the vendor sold 35 hot dogs, the temperature is expected to be ___degrees.
If y=35
Multiply both sides by 10/3
If the vendor sold 35 hot dogs, the temperature is expected to be 90 degrees.
(c) Based on the line of best fit, for every 10-degree increase in temperature, she should sell 3 more hot dogs.