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Whitepunk [10]
2 years ago
13

PLEASE HELP SHOW YOUR WORKING OUT Branliest

Mathematics
1 answer:
Ad libitum [116K]2 years ago
5 0

Answer:

The equation of this line is therefore    y = 2x + 3.

Step-by-step explanation:

this line passes thru the points (0, 3) and (3, 9).  As we move from  (0, 3) to (3, 9), x increases by 3 and y increases by 6.  Thus, the slope of this line is

m = rise / run = 6/3, or m = 2.  Inserting the known info (m = 2, x = 0, y = 3) into y = mx + b, we get:  3 = 2(0) + b, so we see that b = 3.

The equation of this line is therefore    y = 2x + 3.

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What should be substituted in a linear equation in order to solve it
Murrr4er [49]

Answer:

A value for x.

Step-by-step explanation:

For example,

y=-3x+6

Substitute a random number for x to find the value of y, after which you'll have a point.

8 0
2 years ago
Read 2 more answers
Someone please help, 100 points.
Over [174]
Part 1
Let:
y be the total cost
x be the number of tickets
a be fair admission

Since the fair charges $1.25 per ticket, the equation of the line would look like:

y = 1.25x + a

Since Johnny spent $43.75 and bought 25 tickets, we find a by replacing y with 43.75 and x with 25:

43.75 = 1.25×25 + a

Now solve for a

43.75 = 31.25 + a
43.75 - 31.25 = a
a = 12.50

Going back to the first equation:

y = 1.25x + 12.50


Part 2:
a) Let (9,8) be (x1,y1) and (4,-12) be (x2,y2)
The formula for slope is:
m =  \frac{y2 - y1}{x2 - x1}  \\ m =  \frac{ - 12 - 8}{4 - 9}  \\ m =  \frac{ - 20}{ - 5}  \\ m = 4
b) For the point-slope equation, I'll use (9,8)
Using the formula:
y - y1 = m(x - x1) \\ y - 8 = 4(x - 9)
c) For the slope-intercept form, we solve for y in the point-slope formula:
y - 8 = 4(x - 9) \\ y = 4x - 36 + 8 \\ y = 4x - 28
5 0
2 years ago
What is the name of the line of reflection for the pair of figures? Enter your answer in the box. line
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Are you asking for the letter or what the line is called because if it's just the letter then it is r if it is the name then its a plane intersect.

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Step-by-step explanation:

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MA_775_DIABLO [31]
(9,-4) you have to plugin 9 to the equation in the form of x. Then you add 5 and that would be your y value
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