Plz will give brainliest and rating plus 19 points a straight line with a gradient of 3 passes through the point with co-ordinates (0,7) write down equation of line? a second line perpendicular to the first passes through the point (0,2) write down equation of this line and plz explain

As the general formular for a straight line is


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.


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

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425

Do you have answer choices?