Question

The graph shows the relationship between the amount of change given from a $10 bill and the number of bagels purchased.

Answer 1

The graph is a linear graph

The equation of a linear graph is given in the form $y=mx+c$ where $m$ is the gradient and $c$ is the y-intercept

To find gradient:
Choose any two coordinates that lie on the line.
We choose (4,7) and (0, 10)
$m= \frac{ y_{1}- y_{0}}{ x_{1}- x_{0} }$
$m= \frac{10-7}{0-4} =- \frac{3}{4}$

the graph crosses the y-axis at 10, so the value of $c=10$

Forming the equation
$y=- \frac{3}{4} +10$

Answer: D

Answer 2

Answer: i believe the answer is D

Step-by-step explanation: