Answer:
a. - in 1 hour, they were at 1000 ft. in elevation
b. - This value represents that they started at 720 ft. in elevation. This is initial value.
c. - Every hour, the elevation changes by 280. ft. This is rate of change.
d. - 280x = y
Answer:
a. after 1 hour they were at 1000 ft of elevation.
b. initial value
c. rate of change
d. y = 280*x + 720
Step-by-step explanation:
In the figure attached, the graph is shown.
a. The ordered pair (1, 1000) means that after 1 hour they were at 1000 ft of elevation.
b. 720 is the initial value, that is, the value when t = 0
c. From t = 0 to t = 1 the elevation goes from 720 ft to 1000 ft, then, in 1 hour their elevation increase 1000 - 720 = 280 ft. It represents the rate of change
d. Using the slope-intercept form:
y = m*x + b
where m is the slope (or rate of change in a linear equation like in this problem) and b is the y-intercept (referred previously as the initial value for the context of this problem). Replacing with the obtained values:
y = 280*x + 720
where y is the elevation (in feet) and x is time (in hours)
