Question

The equation y = 8.5x - 77.5 is a linear model for data comparing the

Answer 1

Answer:

305 feet

Step-by-step explanation:

you only need to replace the given data into the equation.

the value (y) is the one you are being asked to find and (x) is the given one

so:

y=8.5(x)-77.5

y=8.5(45)-77.5

y=382.5-77.5

y=305

since the units are given, you instantly know that y=305feet

Answer 2

Answer:

The average stopping distance is 705 feet.

Step-by-step explanation:

The given equation is

$y=8.5x-77.5$

Observe that the the ratio of change is 8.5 and the y-intercept is at (0, -77.5).

Where $x$ is the speed and $y$ is the distance.

So, to find the average stopping distance of a car going at 45 mph, we just replace this value in the given equation

$y=8.5x-77.5\\y=8.5(45)-77.5\\y=382.5-77.5\\y=305$

Therefore, the distance is 705 feet.