1. ## Elevation ????

A car is traveling down a long, steep hill. The elevation, E, above sea level (in feet) of the car when it is d miles from the top of the hill is given by E=7500-250d, where d can be any number from 0 to 6. Find the slope and y-intercept of the graph of this function and explain what they mean in the contest of the moving car.

2. Well the elevation is a function of distance so you can probably recognize this as y=7500-250x. The domain of this function is [0,6]

So graph the function from zero to six.

The slope is -250 and y intercept is when x=0 and that is 7500

I don't know what the other thing means

3. Originally Posted by learnmath
A car is traveling down a long, steep hill. The elevation, E, above sea level (in feet) of the car when it is d miles from the top of the hill is given by E=7500-250d, where d can be any number from 0 to 6. Find the slope and y-intercept of the graph of this function and explain what they mean in the contest of the moving car.
To learn about straight-line equations (such as how to find the slope and the y-intercept from the slope-intercept form), try here. To learn how to interpret slope and y-intercept in the context of a word problem, try here.

Long story short: In "y = mx + b", the slope is "m" and the y-intercept is "b"; the slope is the rate of change, and the y-intercept is the starting value.