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pison3163
23.04.2020 •
Mathematics
Use the diagram of abcd to find M angle a
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Ответ:
The initial value is 150, and it represents the number of songs she wants to download to begin with.
B) y = -30x + 150
Explanation
A) The rate of change can be found by using the slope formula between the first two points, (0, 150) and (1, 120):
m=(y₂-y₁)/(x₂-x₁) = (120-150)/(1-0) = -30/1 = -30
The initial value is the y-value of the first point on the graph, (0, 150).
B) The equation is in slope-intercept form, y=mx+b, where m represents the slope and b represents the y-intercept. The slope is the rate of change that we found in part A; the y-intercept is the initial value we found in part A. This gives us the equation y=-30x+150.