Is y=-9x proportional
2 answers:
Answer:
Proportional.
Step-by-step explanation:
We have been given that given an equation . We are asked to determine whether the given equation is proportional or not.
We know that two proportional quantities are in form , where k is constant of proportionality.
We can see that our given equation is in form , where
.
Therefore, the given equation is directly proportional.
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Answer:
9x+5y=-45
Step-by-step explanation:
To write the equation of a line we must have a slope and a point. To find the slope we use the slope formula and substitute (x,y) points in it as shown below:
Now that we have the slope, plug in the slope and choose one point to plug into the point slope formula. Use the point-slope form to write the equation, then simplify and convert into the slope intercept form.
(y-0)=-9/5(x--5)
y=-9/5(x+5)
y=-9/5x-9
Now convert to standard form, Ax+By=C.
y=-9/5x-9
9/5x+y=-9
9x+5y=-45