So a basic function is y=mx+b where m is a rate and b is the constant. His goal is 150 so y is 150 and the rate of his baking is 16 so m is 16, finally he has already 22 done so 22 remains constant. Plugging all these in you should get the following equation:
150=16x+22
Answer:
(-1, 5)
(0, 3)
(2, -1)
Step-by-step explanation:
we have
Remember that
If a ordered pair is a solution of the given function, then the ordered pair must satisfy the given function
<u><em>Verify each case</em></u>
case a) (-2, -1)
substitute the value of x and the value of y in the given function and compare the result
---> is not true
therefore
Is not a ordered pair of the given function
case b) (-1, 5)
substitute the value of x and the value of y in the given function and compare the result
---> is true
therefore
Is a ordered pair of the given function
case c) (0, 3)
substitute the value of x and the value of y in the given function and compare the result
---> is true
therefore
Is a ordered pair of the given function
case d) (1,0)
substitute the value of x and the value of y in the given function and compare the result
---> is not true
therefore
Is not a ordered pair of the given function
case e) (2, -1)
substitute the value of x and the value of y in the given function and compare the result
---> is true
therefore
Is a ordered pair of the given function
-16=-3(7a+8)
multiply the bracket by -3
(-3)(7)=-21
(-3)(80=-24
-16=-21a-24
move -24 to the other side
sign changes from -24 to +24
-16+24=-21a-24+24
8=-21a
divide both sides by -21 to get a by itself
8/-21=-21a/-21
answer:
a=-8/21
The answer is A.
I used the formula for finding the vertex of a parabola and I got the first answer choice. So A is correct. :)