I need the exact linear equation pls I need help

  y = -3x +180

Step-by-step explanation:

It works best if you can identify points that lie at grid intersections. Two of them are ...

  (30, 90), (40, 60)

The slope formula give the slope of the line as ...

  m = (y2 -y1)/(x2 -x1)

  m = (60 -90)/(40 -30) = -30/10 = -3

The slope-intercept equation can be rearranged to help you find the y-intercept:

  b = y -mx

  b = 90 -(-3)(30) = 180 . . . . using the first point

Then the slope-intercept equation is ...

  y = mx +b . . . . . . line with slope m and y-intercept b

  y = -3x +180

don't knwo

Step-by-step explanation:

dont know. 3738373 oh ye73e