A mobile phone costs $320. It is reduced in a sale by 45%. Work out the sale price of the mobile phone.
2 answers:
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The required equation is:
Step-by-step explanation:
Let l_1 be the line through (-1, -2) and (5, 3)
and l_2 be the line we require which passes through (3,7)
We have to find the lope of l_1 first
we have to find the equation of line perpendicular to l1
The product of slopes of two perpendicular lines is -1
Let m_2 be the slope of l_2
Then
The general slope-intercept form is:
y=mx+b
Putting the value of slope
To find the value of b, we will put (3,7) in the equation
Putting the values of b and m in standard slope intercept form:
Hence,
The required equation is:
Keywords: Equation of line
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