4.
How can you use a graph of a linear relationship to predict an unknown
value of y for a given value of x within the region of the graph?

Step-by-step explanation:

Take a look at this graph (sorry, it's small).  The graph shows three data points, (0, 1), (2, 6), and (4, 8).  The line is called the "line of best fit" or "regression line."

The equation for the line is y = 1.75x + 1.5 .

The data did not include a point for x = 3, but it can be predicted by finding the y-coordinate on the line that corresponds to x = 3.

Substituting x = 3 into the line's equation gives

y = 1.75(3) + 1.5 = 6.75

That's the predicted value of y for x = 3 given the linear relationship shown.

the red lines denote the population of the bacteria after 35 hours. that would be 2,409.24. the y-intercept is the blue line which is 800 because that is the starting point. the equation used to make the graph is 800(1.032)^h, where h is the number of hours.

step-by-step explanation:

the solution is the point

step-by-step explanation:

we have

> equation a

> equation b

adds equation a and equation b

substitute the value of x in equation b to find the value of y

the solution is the point