Jonah and his friends went to the movie theater. He bought a movie ticket, and he split the cost of a giant popcorn with his fri
ends. Jonah's costs are represented by the expression 11+15x . What do the different parts of the expression model? Drag the parts of the expression into the boxes to match each description.
1 answer:
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<h2>Answer</h2>
Draw a graph which joins the points (100, 120) and (50, 95) and has a slope = 0.50
<h2>Explanation</h2>A graph of y against x means that x is the independent variable and y is the dependent variable. Notice that the charge (y) depends on the number of minutes (x). Therefore, the points that we are going to join to make our graph will have coordinates (x, y)
We know that the company charges $120 for 100 minutes, so x=100 and y=120. Therefore, our first point will be (100, 120)
We also know that the company charges $95 for 50 minutes, so x=95 and y=50. Therefore, our second point will be (50, 95)
Now, to find the slope between our tow points, we are going to use the slope formula:
where
are the coordinates of the first point
are the coordinates of the second point
We know from our points that ,
,
, and
. So let's replace those values in our formula to find
Now that we have our slope, we can use the point-slope formula to complete the equation of the line joining our two points