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:
Step-by-step explanation:
Line equation is given as y = mx + b
Where, m is the slope of the line, which is,
b is the y-intercept. It is the point at which the line crosses the y-axis for which the value of x = 0.
=>Find m and b to derive an equation for the line.
using the 2 coordinate pairs, (1, 5), (-1, -5),
Let, x2 = -1,
x1 = 1,
y2 = -5,
y1 = 5
From the graph given, the line intercepts the y-axis at point 0. Therefore b = 0.
Plug in the values of m and b in the line of equation.
y = mx + b
y = 5x + 0
y = 5x
Therefore, the equation of the line, in the graph above, written in slope-intercept form is: