Jessica is selling books during the summer, can someone help out
1 answer:
Answer:
Option B is the answer - For each additional door she knocks on, her earnings increase by $7.
Step-by-step explanation:
The linear equation is given as :
Now we will check the equation by putting values of x in it.
Say if Jessica knocks 10 doors ,
= $45
If she knocks 11 doors ,
= $52
If she knocks 12 doors ,
= $ 59
Rate of change is
We can see that, there is a constant increase of $7 with each increased door she knocks.
Therefore, option B is the answer.
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Answer:
The slope of the graph is 5, and the y-intercept is (0, -3).
Step-by-step explanation:
Let's start by finding the y-intercept.
The y-intercept is the point where the line intercepts the y-axis.
Looking at the graph, we can determine that the y-intercept is (0, -3).
The slope of a graph can be found using two points on the line.
Let's use (0, -3) and (1, 2):
Therefore the slope of the graph is 5, and the y-intercept is (0, -3).
The quadratic has one root with multiplicity 2 if the discriminant is 0, which is
(That is, for a quadratic , the discriminant is
.)
Set the discriminant equal to 0 and solve for :