Use the grid to create a model to solve the percent problem. 21 is 70% of what number?
1 answer:
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Answer:
1/3
Step-by-step explanation:
When the equation of a line is in standard form:
ax +by = c
We can find its slope by solving for y:
by = -ax +c
y = -a/bx +c/b
The slope is the coefficient of x. The slope is -a/b.
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A perpendicular line has a slope that is the negative reciprocal of this:
slope of perpendicular line = -1/(-a/b) = b/a
In the given equation, a=3, b=1, so the slope of the perpendicular line is ...
b/a = 1/3
