Explain how you could solve the following using equal groups.
1 answer:
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Answer:
3rd option,
Step-by-step explanation:
To find out which option is correct, we can write the equation in point-slope form ourselves.
Use the point-slope formula to write the equation in point-slope form. Substitute the
,
, and
for real values.
Since represents the slope, substitute
in its place. Since
and
represent the x and y values of a point the line intersects, substitute the x and y values of (5,1) into the formula as well. Substitute 5 for
and 1 for
. This gives the following equation:
Answer:
x = - 6
Step-by-step explanation:
Given that y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = - 9 when x = 3, thus
k = =
= - 3
y = - 3x ← equation of variation
When y = 18, then
18 = - 3x ( divide both sides by - 3 )
x = - 6