Two gallons of gasoline cost $7.96, 5 gallons cost $19.90, and 12 gallons cost $47.76. Which equation gives the total cost y of
x gallons? (It’s the first question, 7a. I don’t get it pls help will give “thanks” and brainiest answer)
2 answers:
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Answer:
.
Step-by-step explanation:
The question requires that the equation should be in the slope-intercept form . The
and
in this equation are constants. In particular:
would represent the slope of this line (also known as the gradient of this line,) whereas
would be the
-intercept of this line.
The question states that the slope of this line is . Therefore,
. Thus, the equation for this line should be in the form
.
The value of constant could be found using the other piece of information: the point
is in this line. In other words, the solution
should satisfy the equation
.
Substitute into the equation
and solve for
:
.
.
.
Hence, would be the slope-intercept form of the equation of this line.