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What are the x-intercept and the y-intercept of the graph of 9x - 7y = -63?

May 4, 2020

#2
+1

9x - 7y  = - 63

To get the slope, isolate y

-7y  =  - 9x  -  63       divide both sides by -7

y  =  (9/7)x + 9        the slope is 9/7

y intercept.....let x  =  0

9(0)  - 7y  =  - 63

-7y  = - 63       divide both sides by -7

y  = 9

x intercept.....let y  = 0

9x - 7(0)  =  -63

9x  = -63    divide both sides by 9

x  =  -7

See the graph here :   https://www.desmos.com/calculator/rj05khxcvb   May 4, 2020

#1
+1

Slope = 2.571/2.000 = 1.286

x-intercept = 14/9 = 1.55556

y-intercept = 14/-7 = 2/-1 = -2.00000   May 4, 2020
#2
+1

9x - 7y  = - 63

To get the slope, isolate y

-7y  =  - 9x  -  63       divide both sides by -7

y  =  (9/7)x + 9        the slope is 9/7

y intercept.....let x  =  0

9(0)  - 7y  =  - 63

-7y  = - 63       divide both sides by -7

y  = 9

x intercept.....let y  = 0

9x - 7(0)  =  -63

9x  = -63    divide both sides by 9

x  =  -7

See the graph here :   https://www.desmos.com/calculator/rj05khxcvb   CPhill May 4, 2020