A shape is shown on the graph: A coordinate plane is shown. Triangle ABC has vertices 3 comma 0, 3 comma negative 3, and 1 comma
1 answer:
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Answer:
The graph in the attached figure
Step-by-step explanation:
we know that
The equation of a exponential decay function is equal to
where
a is the initial value or y-intercept
r is the rate of change
we have
so
To graph the exponential function, find different values of f(x) for different values of x
so
For x=-1 ----->
For x=-0.5 ----->
For x=-0 ----->
For x=0.5 ----->
For x=1 ----->
Plot the points and join them to graph the exponential function
The graph in the attached figure
First, notice that we want the average to be 85 or higher. We can write this like this:
where mu is the average.
We know that there are four tests, and there are already three grades: 78,80 and 88. Then if we calculate the mean we have:
but we already know that the average must be greater or equal than 85, then, combining both expressions we get the following:
solving the inequality for x, we get:
therefore, Erika needs a score of 94 or higher in order to make the honor roll