Write an equation for the data in the table. Identify your variables.

First find the slope m. slope formula:

Let's use (0, -20) for x1 and y1; and (2, 10) for x2 and y2

= =

Now find the y-intercept: the point where the graph crosses the y-axis. The y intercept always has an x value of 0. So -20 is the y-intercept

Use the slope formula . Slope=m, y-intercept = b

y = 15x - 20

y is the money in the bank account in dollars

x is the day

step-by-step explanation:

tip $2.90

total $17.40