peetjayden peetjayden
  • 23-09-2022
  • Mathematics
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PLEASE PLEASE HELP !!!!

Which function represents the equation of the line?

PLEASE PLEASE HELP Which function represents the equation of the line class=

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reinhard10158
reinhard10158 reinhard10158
  • 23-09-2022

Step-by-step explanation:

when x increases by 1. y decreases by 7.

e.g. from (-4, 7) to (-3, 0).

the slope is therefore -7/1 = -7.

the slope is always the factor of x in the equation.

y = -7x + b

b is the y-intercept (the y value when x = 0).

let's use e.g. (-3, 0) to get b :

0 = -7×-3 + b = 21 + b

b = - 21

so, the full equation is

y = -7x - 21

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