a). The y-intercept is the point where the graph touches the y-axis.
It's the value of ' y ' when x=0.
The y-intercept of this graph is 4,500 ft.
It's the jumper's altitude at time = zero minutes.
b). The slope of the line is
(change in ' y ') / (change in ' x ')
both over the same part of the graph.
Let's use the whole graph ... the whole slanted line.
' y ' changes from 4,500 ft to zero. The change is - 4,500 feet
' x ' changes from zero to 3 minutes. The change is 3 minutes
Slope = (- 4,500 ft) / (3 min) = - 1,500 ft/minute
According to the slope, the diver is descending (dropping, going down).
The rate of drop is 1,500 ft per minute. Same as 25 ft per second.
c). The x-intercept is the point where the graph touches the x-axis.
It's the value of ' x ' that makes ' y ' be zero.
On this graph, the x-intercept is 3 minutes.
It's the time when the diver reached the ground ... her altitude became zero.
Simply, you subtract the spa area from the deck one.
A = (6x+10)(3x+4)-[(5x+2)(2x+1)]
A = 18x^2+24x+30x+40-(10x^2+5x+4x+2)
A = 18x^2+24x+30x+40-10x^2-5x-4x-2
A = 8x^2 + 45x + 38
Answer D
The answer is Negative 6 because replace the x with 3 and the y with 2. Therefore your problem would be 3-3(2) and multiplication comes first so you would multiply then subtract
