Answer:
y = -x + 3
Step-by-step explanation:
The equation of a straight line is generally written as;
y = mx + b
where m is the slope and b is the intercept
To get the slope we use the slope formula
Mathematically, that is;
m = (y2-y1)/(x2-x1) = (-1-2)/2-1 = -3/1 = -1
To get the intercept we equate any of the points to the partial equation that we have;
From;
y = -x + b
2 = -1 + b
b = 1 + 2 = 3
So the equation is;
y = -x + 3
Q1 the correct answer is D
<em>W is the function. Look at the x-value table, if there are 2 x-values that are the same then it's not the function.</em>
Answer:
(5, 18) and (-3, 2)
Step-by-step explanation:
We have two equations:
Let's eliminate y by setting the two equations equal:
Move all the terms to one side:
Factor:
Solve for x:
x - 5 = 0
x = 5
OR
x + 3 = 0
x = -3
Plug each of these values of x into any of the two original equations:
y = 8 + 2 * 5 = 8 + 10 = 18
y = 8 + 2 * (-3) = 8 - 6 = 2
The solutions are (5, 18) and (-3, 2).
Hope this helps!