y=3x-7
y= -5x+8
is it......
A. 3,-5
B. -7, 8
C. -3/7, 8/5
2007-04-28 09:07:31 · 11 answers · asked by ghhshdh 1 in Science & Mathematics ➔ Mathematics
B. -7, 8
____
y = mx + b is the slope-intercept form of the equation of a line
m... slope
b.... y-intercept
Hope this helps.
2007-04-28 09:10:53 · answer #1 · answered by M 6 · 7⤊ 0⤋
B.
The y intercept in equations like these are the constants (just plain numbers without an x attached) and the negative or positive sign that goes with it. The first one is -7 because the other number in the equation, the 3, has an x attached. In the second equation, the -5 is attached to the x, so the y intercept is 8.
2007-04-28 16:13:23 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The Y intercept is the value of y when x = 0 (and vice versa)
Unless there is something unusual the values are therefore
y=0 - 7
y=0 + 8
-7 and 8 i.e B
2007-04-28 16:12:15 · answer #3 · answered by welcome news 6 · 0⤊ 0⤋
y=mx+b
b is the y intercept when x = 0.
y= 3(0) - 7, b= -7
y = -5(0) + 8, b= 8
Answer is B
2007-04-28 16:13:28 · answer #4 · answered by Robert L 7 · 0⤊ 0⤋
This one can be solve by inspection alone. The y-intercept of ANY equation in the form y = mx + b is ALWAYS the last number (or the b) -- in this case, the -7 and the 8.
2007-04-28 16:13:34 · answer #5 · answered by Don E Knows 6 · 0⤊ 0⤋
B. -7, 8
These equations are written in slope intercept form: y = mx +b. The m equals the value for slope and b equals the y-intercept. When looking for the value of 'b' in both equals, you can see that in the first one it is -7 and in the second +8. If the equation isn't already in slope-intercept form, you can solve it for y and therefore put it into that form.
2007-04-28 16:13:54 · answer #6 · answered by skm4usa 3 · 0⤊ 0⤋
Given the system find the Y-INTERCEPT of each equation.?
y=3x-7intercept on the y-axis=-77intercept on the x-axis=7/3
y= -5x+8intercept on the y-axis=877intercept on the x-axis=8/5
is it......7 intercept on the y-axis=77intercept on the x-axis=
A. 3,-57intercept on the y-axis=no
B. -7, 87intercept on the y-axis=no
C. -3/7, 8/5
2007-04-28 16:16:40 · answer #7 · answered by Anonymous · 0⤊ 0⤋
It's B.
To get the y intercept of a line, just plug in a 0 for the x and solve the resulting equation for y. It really is that simple âº
Doug
2007-04-28 16:15:15 · answer #8 · answered by doug_donaghue 7 · 0⤊ 0⤋
B is the correct answer
Remember that the equation of a line is y=mx+b, where m is the slope and b is the y-intercept. Therefore, on the first one, b=y-intercept=-7
On the second one,
b=y-intercept=8
This gives us answer B
2007-04-28 16:13:36 · answer #9 · answered by Pius Thicknesse 4 · 0⤊ 0⤋
y = mx + b
b = y-intercept
-7 and 8
2007-04-28 16:11:01 · answer #10 · answered by 7 · 0⤊ 0⤋