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jonny [76]
3 years ago
11

PLZ HELP WILL GIVE BRAINLIEST THANKS AND RATING PLUS 19 POINTS

Mathematics
1 answer:
monitta3 years ago
6 0
As the general formular for a straight line is
y = mx + c


m represents the gradient
c represents the point at which the line crosses the y axis.
Therefore you simply plug the numbers into the equation.
y = 3x + 7


You can work out whether 2 lines are perpendicular by multiplying their gradients. The product of the gradient of perpendicular lines will always be -1.
If lines are perpendicular, M1× M2 = − 1
So you can rearrange the equation to get M2=-1/M1.
As they perpendicular they have to intercept at the same point on the Y axis therefore you get the equation
y =   -  \frac{1}{3}x + 7





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