3 years ago

Pass through (4,7) slope -2

Mathematics

1 answer:

k0ka [10]3 years ago

4 0

Hello from MrBillDoesMath!

Answer:

y = -2x + 15

Discussion:

Equation of a line is y = mx + b. We are given that m = -2 so the equation becomes.

y = -2x + b

As the line passes through (4,7), substituting these values in the equation gives

7 = -2(4) +b =>

7 = -8 + b => (add 8 to both sides)

7 + 8 = b

so b = 15

The full equation is therefore

y = -2x + 15

Regards,

MrB

P.S. I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!

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