The method to estimate the y - value from a graph is discussed below.
We have a graph.
We have to estimate how can the graph be used to predict the output (y- value) associated with an input of x = [tex]3\frac{1}{2}[/tex] = [tex]\frac{7}{2}[/tex] = 3.5
A diagram showing the relation between variable quantities, typically of two variables, each measured along one of a pair of axes at right angles.
According to the Question -
Assume that you have a graph plotted for the straight line given by -
y = 2x + 5 ...(1)
(Refer to the figure attached)
The x values are plotted along the horizontal line and the y values are plotted along the vertical axis. You can see in the diagram that for x = [tex]3\frac{1}{2}[/tex] or 3.5 the corresponding value for y is 6.8. You can repeat the same process for almost any value of x. Similarly, you can find out the value of y without using graph. For x = 5, using Eq (1), we get -
y = 2 x 5 + 5 = 15
Hence, using this way you can predict the y - value for any input.
To solve more questions on Graphs, visit the link below -
https://brainly.com/question/17230119
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