Algebra: Check please!!!
posted by Cheryl on .
1. Find the x-intercept and the y-intercept of 8x - 2y = -24.
a. x= -7, y= 2
b. x= -4, y= 14
c. x= -3, y= 12
d. x= -7, y= -2
Find the x- and y- intercept of the line 2x + 3y = -18.
a. x-intercept is 18, y-intercept is 18
b. x-intercept is -6, y-intercept is 9.
c. x-intercept is 2, y-intercept is 3.
d. x-intercept is -9, y-intercept is -6.
They are both incorrect.
To find the x-intercept of the line
L : ax + by + c = 0
you would set y=0, (that is, where the line intersects the x-axis) and solve for x in :
ax + b(0) + c =0
To find the y-intercept, you would similarly set x=0, where L intersects the y-axis, and solve for y:
a(0) + by + c =0
Try the problems using the above methods and post your answers for checking if you wish.
what is the intercept form of -3x+3y=15