SOLUTION: A- How can the graph for the rule y=2x+1 be used to predict the result for an imput (x- value) of 7? How can the graph be used to predict the output (y- value) associated with an i

Question 59508: A- How can the graph for the rule y=2x+1 be used to predict the result for an imput (x- value) of 7? How can the graph be used to predict the output (y- value) associated with an input of 3 1/2?
Found 2 solutions by praseena, chitra:
Answer by praseena(37) (Show Source): You can put this solution on YOUR website!
you can solve this problem numerically like this,
y=2x+1
when x=7, substitute the x value=7 in the given rule.
y=2*7+1
=14+1
=15
That is when the input is 7, the output is 15.

To predict the output when input is 31/2,
for that, you just put the value x=31/2 in the given rule
that is, y = 2 * 31/2 +1
= 31 + 1= 32
That is when the inputis 31/2, the out put is 32

Answer by chitra(359) (Show Source): You can put this solution on YOUR website!
Solution:
We first plug in for different values of x, to get the corresponding values of y.
Therefore, the table of values are:
X 0 1 2 3 4 5 6 7 8
y 1 3 5 7 9 11 13 15 17
Using these values, we draw the graph of the given straight line.
The graph looks as follows:

So from the above graph, when x takes the value 7, the value
of y is 15.
So in a similar way when x = 3 1/2, that is 7/2 then the value of y is 8. This point is obtained by plugging in the value of x in the given equation.

Y = 2(7/2) + 1
 y = 7 + 1
 y = 8

RELATED QUESTIONS
how can the graph for the rule y=2x + 1 be used to predict the result for an input (x... (answered by josgarithmetic)
I'm stuck in this exercise can anyone help me please? Here is the exercise Caffeine... (answered by ikleyn)
Can cramer's rule be used for: if so what would I use for the middle equation for the... (answered by jim_thompson5910)
Part I. G(x) = -x4 + 32x2 +144 a. Show whether G is an even, odd function or... (answered by MathLover1)
A $5000 investment that grows at annual rate of 6% can be modeled by the function: y =... (answered by stanbon)
describe how the graph of y=x^3 can be transformed to the graph... (answered by lwsshak3)
What are the x-intercept and y-intercept of a linear equation? What are their coordinates (answered by checkley77)
A $5000 investment that grows at annual rate of 6% can be modeled by the function: y =... (answered by Alan3354)