Error Analysis A question on a test asks students to find the speed at which a car travels.
The graph shows a proportional relationship
between the distance traveled in miles and time
in hours. Anna incorrectly says that the speed of
1
the car is mile per hour. What is the speed of
57
the car? What error might Anna have made I
The speed of the car is
miles per hour.

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126