Help me with number three please
2 answers:
If you have a lot of these to do, it is convenient to use a spreadsheet or other method of doing the computation.
The 2-point form of the equation for a line applies.
.. y = (y2 -y1)/(x2 -x1)*(x -x1) +y1
From this, you can determine that
.. m = (y2 -y1)/(x2 -x1)
and
.. b = y1 -x1*(y2 -y1)/(x2 -x1)
a) m = 15, b = -8
b) m = -2.5, b = 8
c) m = -1, b = 10
d) m = 3/4, b = -10
The attached graph shows the computation of m and b. The first point of each set is shown in purple, the second point is shown in red. You can see the line goes through the required points.
The 2-point form of the equation for a line applies.
.. y = (y2 -y1)/(x2 -x1)*(x -x1) +y1
From this, you can determine that
.. m = (y2 -y1)/(x2 -x1)
and
.. b = y1 -x1*(y2 -y1)/(x2 -x1)
a) m = 15, b = -8
b) m = -2.5, b = 8
c) m = -1, b = 10
d) m = 3/4, b = -10
The attached graph shows the computation of m and b. The first point of each set is shown in purple, the second point is shown in red. You can see the line goes through the required points.
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9514 1404 393
Answer:
y = -x -12
Step-by-step explanation:
The slope of the line you want is the same as the slope of the line you have: -1. Then the point-slope equation of the line is ...
y -k = m(x -h) . . . . . . line of slope m through point (h, k)
y -(-7) = -1(x -(-5))
y = -x -5 -7 . . . . subtract 7, eliminate parentheses
y = -x -12 . . . slope-intercept equation
