Mathematics
Grade10
Easy

Question

Find the equation of a line whose slope is -7 and y-intercept is -8.

  1. y = -7x + 8
  2. y = -7x - 8
  3. y = 7x - 8
  4. y = 7x + 8

Hint:

Given the slope of line as m and intercept as b .

the Equation of line will be y = mx + b .
 

The correct answer is: y = -7x - 8


    Given slop = -7 and intercept = -8
    Step 1 : Using the slope and y-intercept of the line to write the equation of the line.
    Slope-intercept from of equation of a line is y = mx +b
    Step 2 : substituting values
    ⇒ y = -7x -8              [substituting -7 for m and -8 for b]
    So , y = -7x -8 is the equation of line with slop = -7 and intercept = -8 .

    Equation of line in slope intercept form is 

    y = slope.x + intercept .
     

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