Answer:
Step-by-step explanation:
Answer: b = -20
Step-by-step explanation: I have difficulty reading the table of values of (x,y). I picked just the first (10, -120) to calculate b.
y = -10x + b
-120 = -10(10) + b
b = -20
That should work for all the points:
(20, -220) : -220 = -10(20)-20 - Yes, etc.
But the values towards the end of the table don't makes sense/don't work. (0, -2)????
Well in order to find the slope the equation should be in y= mx +b format, where m=slope
to do this you take your equation,
7x=-3y+15
and notice how the x and y are in the wrong position ,
add the 3y to both sides and subtract 7x from both sides
7x=-3y+15
+3y +3y
7x+3y=15
-7x. -7x
3y=-7x+15
now we need the y to be by itself so we divide the entire equation by 3 and get
y=-7/3x+5
so -7/3 or 2.33 or 2 1/3 would be the slope, the slope of parallel lines are equal
(a)=940
(b)=1680
(c)=1950
(d)=4440