Answer:

Step-by-step explanation:
<u>Point slope form</u>
y=mx +c, where m is the gradient and c is the y-intercept.
To find the gradient, use the formula below:


Substitute the value of m into the equation

To find c, substitute a coordinate into the equation.
When x= -3, y=7,

Thus, the equation of the line is 
The answer is (x+3)(x+5).
Answer:
Slope of line 1 = 3
Slope of line 2 = -3
Slope of line 3 = -1/3
Line 1 and 2 = perpendicular
Line 1 and 3 = perpendicular
Line 2 and 3 = perpendicular
Step-by-step explanation:
trust me its correct
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