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Find a point-slope form for the line with slope 1/2 and passing through the point (-7,-9) .


Find A Pointslope Form For The Line With Slope 12 And Passing Through The Point 79 class=

Sagot :

Answer:

point slope: y-y1=m(x-x1)

m is slope. now we plug in numbers

y--9=1/2(x--7)

a negative times a negative us positive and a negative times a positive is negative

y+9=1/2(x+7)

now distribute 1/2

y+9=1/2x+7/2

now get y alone by using opposite operation to get 9 on the other side of the equal sign

y and nine are adding. the opposite of addition is subtraction

y+9-9=1/2x+7/2-9

y=1/2x+7/2-9

get 7/2 and 9 to have equal denominators

(7/2)-(9/1)

multiply 2 for numerator and denominator

(7/2)-((9÷1)×(2÷2))

7/2-18/2=-11/2

y=1/2x-11/2