State the slope and y intercept of the equation for these 3 questions
1 answer:
Answer:
see explanation
Step-by-step explanation:
the equation of a line in slope-intercept form is
y = mx + c ( m is the slope and c the y-intercept )
(1)
y = 3x + 4 is in this form
with slope m = 3 and y-intercept c = 4
(2)
y = - x -
is in this form
with slope m = - and y-in tercept c = -
(3)
rearrange 3x + y = - 4 into slope-intercept form
subtract 3x from both sides
y = - 3x - 4 ← in slope-intercept form
with slope m = - 3 and y-intercept c = - 4
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In the future, please post the full problem with all included instructions. After doing a quick internet search, I found your problem listed somewhere else. It mentions two parts (a) and (b)
Part (a) asked for the equation of the line in y = mx+b form
That would be y = -2x+9
This is because each time y goes down by 2, x goes up by 1. We have slope = rise/run = -2/1 = -2. This indicates that the height of the candle decreases by 2 inches per hour. The slope represents the rate of change.
The initial height of the candle is the y intercept b value. So we have m = -2 and b = 9 lead us from y = mx+b to y = -2x+9
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Part (b) then asks you to graph the equation. Because this is a linear equation, it produces a straight line. We only need 2 points at minimum to graph any line. Let's plot (0,9) and (1,7) on the same xy grid. These two points are the first two rows of the table. Plot those two points and draw a straight line through them. The graph is below
